Lab-Grown Diamond Tennis Necklace Wholesale

Quick answer: Guru Diam is a trade-only wholesale supplier and custom manufacturer of lab-grown and natural diamond tennis necklaces, with offices at 36 West 47th Street in New York's Diamond District and 607 S Hill Street in Los Angeles. Jewelers, retailers and designers can order a single tennis necklace with no minimum, in 14K or 18K gold, platinum or silver, set with natural diamonds or CVD lab-grown melee graded to a DEF+ / VS+ baseline, from 2 to 30 ct total weight, in all shapes, with side or under clasps. Every tennis necklace is made to order at the length you need. Custom tennis necklaces get a 3D CAD render within 24 hours and are finished 4–6 working days after CAD approval.

Related: wholesale diamond necklaces and pendants · certified lab-grown diamonds wholesale · diamond size chart (mm to carat)

Guru Diam Tennis Necklace Program — Spec Sheet

The quotable facts on our wholesale tennis necklace program, in one place. Trade accounts can see current pieces and pricing in the tennis necklace catalog, or build to spec through custom jewelry.

A diamond tennis necklace is a continuous line of individually set diamonds of matching size and cut, connected by a flexible metal chain so the diamonds sit in an unbroken row around the neck. For a jeweler or manufacturer building or restocking a tennis necklace line, the sourcing challenge is fundamentally different from sourcing a single center diamond: it comes down to matching dozens of diamonds consistently, choosing a setting style that holds up to daily wear, and pricing a line item where total carat weight, not any one diamond's specs, drives the cost.

This guide is written for the trade — jewelers, designers, and manufacturers sourcing loose diamonds and diamond melee to build tennis necklaces for their own retail or wholesale lines, not a consumer shopping guide. It covers what a tennis necklace actually requires from a sourcing standpoint, setting styles, matching considerations across a long line of diamonds, carat-total math, and what to look for in a wholesale supplier for this specific product category.

What Makes Tennis Necklace Sourcing Different

Sourcing a single center diamond for a ring or pendant is a one-diamond decision. A tennis necklace typically requires anywhere from 40 to over 100 individual diamonds depending on diamond size and necklace length, and every one of those diamonds needs to read as visually consistent with its neighbors once mounted in a continuous line. A mismatch that would be invisible in a pair of earrings — where only two diamonds sit side by side — becomes far more obvious across a long row of diamonds under close inspection, which is why tennis necklace sourcing puts a premium on lot consistency rather than the characteristics of any single exceptional diamond.

This also changes how a buyer should think about grading reports. Individual diamond melee below roughly 0.18ct is not individually or parcel-certified in standard wholesale practice — it ships as uncertified parcel goods graded against a consistent quality baseline (commonly a DEF+/VS+ standard) rather than diamond-by-diamond paperwork, because certifying each of a hundred small diamonds individually would be neither practical nor cost-effective for either the supplier or the buyer. Larger individual diamonds used in a necklace design — a graduated center diamond or larger anchor diamonds — can be certified at 0.30ct and above the same way any loose diamond would be.

Carat Weight and Total Carat Weight (TCW) Math

Tennis necklace pricing and design planning both run on total carat weight (TCW) — the sum of every diamond's weight in the piece — rather than any single diamond's carat weight. A 4-carat TCW necklace and a 4-carat TCW bracelet made from the same average per-diamond size will use roughly the same overall diamond weight but a very different diamond count, since a necklace is longer. Getting this math right up front matters for cost planning: TCW, not diamond count alone, is what a wholesale diamond order should be priced and quoted against.

These ranges vary meaningfully with individual diamond size — a necklace built from smaller, more numerous melee reaches a lower TCW at a given length than the same length built from larger diamonds — but they're a reasonable planning baseline for a manufacturer estimating diamond needs before placing an order.

Tennis Necklace Length: Made to Order

Length is the first question a retail customer asks about a tennis necklace and the biggest single driver of diamond count: every extra inch adds diamonds at the same per-diamond size. That's why we don't sell tennis necklaces in a fixed set of lengths. Every Guru Diam tennis necklace is made to order at the length your customer needs, from 2 to 30 ct total weight, in any shape, with a side or under clasp.

For quoting, treat length and total carat weight together. Decide the per-diamond size first, because that sets the look. The length then sets the diamond count, and the count sets the CTW and the price. Quote CTW per length rather than one number for the design, so a customer who asks for "the same necklace, a little longer" gets a real figure on the spot.

Diamond Quality Standards for Tennis Necklaces

Because a tennis necklace displays so many diamonds at once, most manufacturers standardize on a consistent quality tier across the entire piece rather than mixing grades — a DEF+/VS+ baseline (near-colorless to colorless, very slightly included or better) is a common commercial standard that reads as clean and bright to the eye across a long line of diamonds without pricing the piece at the level of individually certified inventory. Buyers targeting a higher-end line sometimes step up to a tighter color range (E-F) or a stricter clarity floor (VVS+) for a more uniformly white, eye-clean look, understanding that tightening the quality band on every single diamond in a 60-to-100-diamond piece meaningfully increases sourcing cost and lead time versus a standard commercial grade.

Setting Styles Used in Tennis Necklaces

Prong (Shared-Prong) Setting

The classic tennis-necklace setting style, where adjacent diamonds share prongs in a continuous line. Prong settings maximize light entry around each diamond for maximum brilliance, but the prongs themselves are more exposed to daily wear and catching than a bezel, which is a practical consideration for a piece meant to be worn frequently.

Bezel Setting

A metal rim surrounds each diamond fully, offering more protection against snagging and impact — a meaningful consideration for a necklace, which sits against skin and fabric constantly — at the cost of slightly reduced light entry and a more modern, geometric look compared to a classic prong tennis line.

Channel Setting

Diamonds sit between two parallel metal rails with no visible prongs at all, giving a smooth, low-profile line that reads as more architectural and contemporary. Channel settings offer strong physical protection for the diamonds but require tighter manufacturing tolerances to keep the row perfectly aligned.

Clasp and Safety Mechanisms Manufacturers Should Specify

Because a tennis necklace is a continuous, high-value line of diamonds, clasp failure is one of the most common (and most costly) points of loss in the category. Manufacturers sourcing components for a tennis necklace line typically specify a box clasp with a secondary safety latch, or a lobster clasp reinforced with a figure-eight safety chain, rather than a single-point clasp — a detail worth confirming with any setting or finishing partner before a production run, since it has a direct bearing on the finished piece's return and warranty-claim rate.

Metal Choices and How They Affect Sourcing

Tennis necklaces are most commonly set in 14k or 18k white gold or platinum, both of which read as neutral and don't compete visually with the diamond line — a warmer metal like yellow or rose gold is used less often for this style specifically because it introduces a visible color contrast against colorless diamonds that some buyers find distracting in a piece meant to showcase the diamonds themselves rather than the metalwork. Metal choice doesn't change diamond sourcing requirements directly, but it does affect finished-piece pricing and should be confirmed before finalizing a diamond order, since some setters adjust prong or bezel dimensions slightly depending on metal.

Lab-Grown Tennis Necklaces Wholesale: What Changes for the Trade

A tennis necklace carries two to three times the diamond weight of a bracelet, so the lab-grown option has an even bigger effect here. A full-length natural tennis necklace at meaningful CTW is a special-order piece for most independent jewelers; a lab-grown version at the same look can be a case item. That's why "lab grown diamond tennis necklace" has become a high-volume search, and why retailers who don't carry one are losing that conversation to someone who does.

The trade rules don't change with origin. Hold a lab-grown line to the same stated color and clarity baseline and the same millimeter tolerance as a natural one, because across 100+ diamonds a mismatch is just as visible. Describe lab-grown diamonds as lab-grown on tags, invoices and certificates, per the FTC Jewelry Guides. And consider running both: the same CAD in natural and lab-grown gives you a statement piece and an accessible piece without a second supplier.

At Guru Diam, lab-grown production is primarily CVD and our lab-grown melee is CVD Type IIa, graded in-house to a DEF+ / VS+ baseline. Either origin is available on any tennis necklace in the program.

Lab-Grown vs. Natural Diamonds for Tennis Necklace Production

Because a tennis necklace's cost scales directly with total carat weight across dozens of diamonds, the natural-vs-lab-grown decision has an outsized effect on total piece cost compared to a solitaire product like a ring. CVD lab-grown diamonds let a manufacturer offer a significantly higher TCW at a given price point, or the same TCW at a significantly lower price point, than natural material of comparable color and clarity — a meaningful consideration for a retailer positioning a tennis necklace line at a specific price tier. Both natural and lab-grown material can meet the same DEF+/VS+ commercial standard described above; the origin decision is primarily a pricing and positioning choice for the retailer rather than a difference in how the finished piece looks or wears.

Matched-Pair and Lot Consistency: What to Ask a Supplier

• Is this melee sold as a matched, graded lot, or pulled from mixed inventory? A supplier who sells calibrated melee specifically for line work will maintain tighter internal consistency than one selling loose, ungraded parcel stock.
• What's the size tolerance across the lot? A tight millimeter tolerance across every diamond in the order matters more for a continuous line than it does for a scattered-diamond design.
• Can I review physical samples before committing to a full production order? For a first order with a new supplier, requesting a representative sample of the actual lot — not just a spec sheet — is standard practice before committing to a full quantity.
• What's the reorder consistency like if I need to match this exact grade again for a future production run? A supplier who can reliably reproduce the same commercial grade on reorder is more valuable to an ongoing retail line than one whose stock varies significantly between orders.

Wholesale Pricing Structure for Tennis Necklace Diamonds

Wholesale pricing for tennis necklace diamonds is typically quoted per total carat weight at a given quality standard, rather than per individual diamond — a DEF+/VS+ melee lot priced per carat lets a manufacturer estimate finished-piece diamond cost directly from the TCW target established during design. Buyers ordering at production volume (multiple necklaces per order, or standing reorders for a retail line) should expect per-carat pricing to improve with order volume and with looser size tolerance requirements, since tighter calibration tolerances require more selective sorting from a supplier's available stock.

Graduated vs. Uniform Tennis Necklace Designs

Most tennis necklaces use a uniform diamond size throughout the line, which is simpler and generally less expensive to source since every diamond in the order needs to match the same single size and quality target. Graduated designs — where diamond size increases gradually from the clasp toward the center front of the neck — are a distinct, higher-complexity sourcing project, since it requires assembling multiple size tiers that all still need to match in color and clarity across the whole piece, not just within each size tier. A retailer or manufacturer considering a graduated design should expect a longer sourcing lead time and a higher per-carat cost than an equivalent-TCW uniform design, and should confirm upfront that a supplier can deliver consistent color and clarity matching across every size tier in the graduation, not just within each individual tier in isolation.

Colored Tennis Necklaces: Sourcing Fancy Color Melee

Fancy color tennis necklaces — built from yellow, pink, blue, or green melee rather than colorless diamonds — have grown as a distinct sub-category, offering retailers a differentiated product against an otherwise commoditized colorless tennis necklace market. Sourcing fancy color melee for a line-set piece carries an added consistency requirement beyond what a colorless order needs: every diamond in the line needs to match not just size, but hue, tone, and saturation closely enough that the finished piece reads as a deliberately uniform color rather than a visibly mismatched mix. This makes fancy color melee sourcing meaningfully more selective than sourcing colorless melee at the same size, and buyers should expect both a longer lead time and a higher per-carat price for a well-matched fancy color lot compared to an equivalent colorless order.

Common Manufacturing Defects to Screen For

A finished tennis necklace involves dozens of individual prong-setting or bezel-setting operations performed in sequence, which creates real opportunities for manufacturing defects that a retailer should screen for before accepting a finished piece from a setting partner. Uneven spacing between diamonds, visible gaps or twisting along the line, prongs that are under-filed and catch on fabric, and inconsistent diamond alignment (where diamonds don't sit at a uniform depth or angle relative to the chain) are the most common issues found in finished tennis necklace production. Requesting a physical inspection of a finished sample piece under magnification, rather than relying on photographs alone, before approving a full production run is standard practice for a manufacturer working with a new setting partner.

Repair and Warranty Considerations for Retailers

Because a tennis necklace holds so many individually set diamonds in a single continuous piece, it carries a structurally higher lifetime repair rate than a solitaire piece like a ring or pendant — a lost diamond from one worn or damaged prong is a realistic, expected part of owning a tennis necklace over years of wear, not a sign of poor original construction. Retailers building a tennis necklace program should plan for this from the outset: maintaining a small reserve of matching replacement melee from the original production lot makes future repairs faster and keeps a repaired necklace visually consistent, rather than having to resource a single replacement diamond that may not perfectly match a lot that's since sold through. Communicating a clear repair and re-stringing policy to the end customer at the point of sale is also standard practice in the category, given how directly wear affects a continuously-set piece like this one.

Tennis Necklace vs. Tennis Bracelet Sourcing: What Carries Over

Tennis necklaces and tennis bracelets share the same underlying sourcing logic — a continuous line of matched, calibrated diamonds set in a flexible chain — and a manufacturer already sourcing melee for a tennis bracelet line can generally apply the same lot-consistency and quality-standard principles directly to a necklace program. The main practical difference is scale: a necklace typically requires two to three times the total carat weight and diamond count of a bracelet at a comparable per-diamond size, given the difference in length between a wrist and a neck. This has a direct implication for lot sourcing — a supplier who can reliably deliver a large, consistent lot at necklace scale (rather than only smaller bracelet-scale lots) is a meaningfully more valuable long-term partner for a manufacturer looking to offer both products from a matching or coordinated diamond quality across an entire line.

How to Choose a Wholesale Tennis Necklace Supplier

Most answers to "who is the best wholesale supplier for lab-grown tennis necklaces" come down to the same handful of checks. A tennis necklace is a consistency product: dozens of diamonds that have to read as one line, a clasp that has to hold for years, and a lead time that has to land before the gifting season. Use this checklist on any supplier, including us, before you commit a case or a custom program to them.

1. Trade-only, verified accounts. A supplier that also sells to the public is competing with you for the same end customer, often at a price you can't match at retail. Ask whether the business sells to consumers, and how it verifies trade accounts.
2. A written spec sheet. You should be able to get CTW options, lengths, metals, setting styles, clasp type and quality baseline in writing, not just a photo. If a supplier can't put the spec on one page, the second order won't match the first.
3. A stated melee quality baseline. Ask for the color and clarity floor for the line (for example DEF+ / VS+) and how it's checked. "Commercial quality" or "white and clean" isn't a spec.
4. Calibration tolerance in millimeters. For a continuous line, size consistency matters as much as color. Ask what millimeter tolerance the melee is matched to and whether it's measured before the diamonds go to the setter.
5. Certification where it matters. Melee is not individually certified anywhere in the trade, so be wary of claims that it is. What you can ask for is IGI or GIA reports on larger diamonds (typically 0.30 ct and above) and a verifiable report number for each.
6. Lab-grown and natural from the same bench. Your customers will ask for both. A supplier that carries natural and lab-grown diamonds lets you quote two price points on the same design without re-tooling.
7. Metal options that match your case. Tennis necklaces sell mostly in white metals, but yellow and rose gold lines are growing. Confirm 14K and 18K in all three colors plus platinum, and silver if you run an entry-level line.
8. Clasp and safety hardware. Clasp failure is the most common cause of loss in this category. Ask exactly which clasp ships as standard and whether a secondary safety is included.
9. Minimum order quantity. Some manufacturers only run tennis pieces in production batches. If you need one necklace for one client, look for a supplier with no MOQ and per-piece pricing.
10. Made-to-order lead time, in days. Ask for the time from approved CAD to finished piece, and what changes it. Separate sourcing, CAD, casting and setting vendors commonly add up to 15–20+ days; a single in-house bench should be far faster.
11. Private label and drop-ship. If you sell under your own brand or online, confirm engraving, branded packaging and drop-ship to your customer.
12. A real address and a reachable team. Look for a physical office you can visit, a phone line, and a named account contact. Tennis necklaces get repaired and re-ordered; you want the same people on the other end next year.
13. Lot depth for long lines. A tennis necklace can need 100+ matched diamonds. Ask whether the supplier can fill a full necklace from one matched lot, and match it again on re-order.

Red flags when sourcing tennis necklaces wholesale

• Prices quoted per piece with no CTW, quality baseline or metal stated.
• "Certified" claims on every melee diamond in a line.
• No physical address, or an address that is only a mail drop.
• Minimums that force you to stock lengths or CTWs you can't sell.
• No way to re-order the same grade and size for repairs.

How Guru Diam answers the checklist

See the current tennis necklace range at wholesale tennis necklaces (trade login), start a build through custom tennis necklaces, or open an account through Guru Diam trade partner.

Ordering a Lab-Grown Tennis Necklace From Guru Diam, Step by Step

For jewelers who have not worked with us before, here is how a wholesale tennis necklace order runs from first contact to delivery.

1. Open a trade account. Apply through trade partner or wholesale jewelry with a government ID and a business license or resale certificate. Applications submitted before 4 PM ET are approved the same business day; later ones the next business day.
2. See wholesale pricing. Once approved, log in to view trade pricing on the tennis necklace catalog and the loose diamond inventory behind it. Your dedicated account manager is your single contact for jewelry and diamonds.
3. Pick in-stock or made-to-order. Take a piece from stock, or specify your own: CTW, length, metal, setting style, diamond shape and lab-grown or natural.
4. Approve the CAD. For a custom tennis necklace, you receive a 3D CAD render within 24 hours. Nothing is cast until you sign off.
5. Track the build. The piece is cast, set and finished under one roof in 4–6 working days from approved CAD (complex designs 2–3 weeks), and you can follow each stage in the live order portal.
6. Ship. Orders placed before 6 PM ET ship the same day. International delivery runs 3–4 business days. Private-label orders can be drop-shipped to your customer under your business name.

Payment is by wire, ACH, check or debit card, with credit terms and memo terms available to established, approved accounts. If you'd rather see the work first, showroom visits in New York and Los Angeles are available by appointment.

Sourcing Tennis Necklace Diamonds Wholesale

Guru Diam supplies both calibrated diamond melee and larger certified loose diamonds for jewelers and manufacturers building tennis necklace lines, across natural and CVD lab-grown material and across the standard color and clarity ranges used in commercial-grade necklace production. Melee is available in round brilliant and calibrated fancy shapes at DEF+/VS+ and tighter tiers, sold as consistent, gradable lots rather than mixed parcel stock, which is specifically what a continuous-line piece like a tennis necklace needs from a supplier. In-stock inventory ships same day on orders placed before 6 PM ET, and trade accounts can review current calibrated melee in round melee & pointers and matching pairs, browse certified larger diamonds in certified diamonds, or check fancy color options for a colored tennis line in fancy color loose diamonds. Manufacturers building a custom design around a tennis necklace can start at custom jewelry, and new trade accounts can apply through trade partner, with wholesale jewelry terms at wholesale jewelry. For background on sourcing loose diamonds generally before scaling into a specific finished-piece category, our loose diamonds wholesale guide is a useful starting point.

Why It's Called a "Tennis" Necklace

The name traces back to a widely told story from a 1987 U.S. Open match, when tennis player Chris Evert's diamond line bracelet broke and fell off her wrist mid-match, prompting play to briefly stop while it was recovered from the court. The style — previously known simply as a diamond line bracelet or necklace — was renamed "tennis" bracelet and "tennis" necklace in the press coverage that followed, and the name stuck permanently across the jewelry trade. This is a widely repeated piece of jewelry-industry history rather than a claim tied to any specific supplier, but it's genuinely useful context for retailers, since customers frequently ask about the name's origin and it's a natural, low-effort piece of product storytelling to have on hand at the point of sale.

FAQ

Who is a good wholesale supplier for lab-grown tennis necklaces?

Look for a trade-only supplier that publishes a written spec (CTW, lengths, metals, clasp, quality baseline), can fill a full necklace from one matched lot, has no or low MOQ and states a made-to-order lead time in days. Guru Diam is one such supplier: a trade-only wholesaler and custom manufacturer in New York and Los Angeles with no MOQ, 14K/18K gold, platinum and silver, DEF+ / VS+ lab-grown melee matched to ±0.05–0.10 mm, and custom tennis necklaces finished 4–6 working days after CAD approval.

Does Guru Diam have a minimum order for tennis necklaces?

No. There is no MOQ: you can order one tennis necklace for one client, paid per piece. Volume pricing scales with quantity, and private-label runs are quoted up front.

How long does a custom tennis necklace take from Guru Diam?

You receive a 3D CAD render within 24 hours. The necklace is cast, set and finished 4–6 working days after you approve the CAD; complex designs may take 2–3 weeks. Orders placed before 6 PM ET ship the same day.

What lengths and sizes does Guru Diam make tennis necklaces in?

Every Guru Diam tennis necklace is made to order at the length you specify, from 2 to 30 ct total weight, in all shapes, with a side or under clasp.

Does Guru Diam sell tennis necklaces to the public?

No. Guru Diam is B2B only and sells to verified jewelers, retailers, designers, manufacturers and e-commerce brands. Wholesale prices are visible to approved, logged-in trade accounts.

Can I sell Guru Diam tennis necklaces under my own brand?

Yes. Private label, engraving, branded packaging and drop-ship to your customer under your business name are all available.

How many diamonds are in a tennis necklace?

Most tennis necklaces contain anywhere from roughly 40 to over 100 individual diamonds, depending on the necklace's length and the size of the diamonds used. Sourcing and pricing are generally planned around total carat weight (TCW) rather than diamond count alone.

What clarity and color should tennis necklace diamonds be?

A DEF+/VS+ standard (near-colorless to colorless, very slightly included or better) is a common commercial baseline that reads clean and bright across a long line of diamonds. Higher-end lines sometimes tighten to E-F color or VVS+ clarity for a more uniform, eye-clean appearance, at additional sourcing cost.

Are tennis necklace diamonds individually certified?

Individual melee-sized diamonds (typically below roughly 0.18ct) are not individually certified — they're sold as graded parcel goods against a consistent quality standard. Larger individual diamonds used as anchor or accent points in a design can be certified at 0.30ct and above.

What setting style is best for a tennis necklace?

Shared-prong settings are the classic choice and maximize brilliance, bezel settings offer more physical protection for frequent wear, and channel settings give a smooth, low-profile modern look. The right choice depends on the intended price point and design direction of the finished piece.

Should a tennis necklace use natural or lab-grown diamonds?

Either can meet the same quality standard and look identical in the finished piece. Because a tennis necklace's cost scales directly with total carat weight across dozens of diamonds, CVD lab-grown diamonds let a manufacturer offer a meaningfully higher TCW at a given price point, which is why lab-grown material is common in this specific product category. The origin decision is primarily a pricing and retail-positioning choice rather than a difference in how the finished piece looks or wears day to day.

How is tennis necklace diamond pricing quoted?

Wholesale pricing is typically quoted per total carat weight at a specified quality standard, rather than per individual diamond, since manufacturers plan the piece around a TCW target during design.

Why is it called a tennis necklace?

The name comes from a widely told story involving tennis player Chris Evert, whose diamond line bracelet broke and fell off during a 1987 U.S. Open match, prompting a brief pause in play while it was recovered. The style was renamed "tennis" bracelet and necklace in press coverage afterward, and the name has stuck across the trade ever since.

Can a tennis necklace be made with fancy color diamonds?

Yes. Fancy color tennis necklaces built from yellow, pink, blue, or green melee are a real, growing sub-category, though they require tighter hue and saturation matching across every diamond in the line than a colorless order, which typically means a longer lead time and higher per-carat cost than an equivalent colorless piece.

Guru Diam is a trade-only wholesale supplier and custom manufacturer of lab-grown and natural diamond tennis necklaces, with offices at 36 West 47th Street, Suite 601A, New York, NY 10036 and 607 S Hill Street, Suite #241, Los Angeles, CA 90014. See wholesale tennis necklaces, build one through custom jewelry, or apply for a trade account through trade partner. Guru Diam is a JBT member. Call +1 (212) 652-7108.