Book Appointment
Custom Jewelry — Cast, Set & Finished in 4–6 Days
IGI & GIA Certified Diamonds
In-House Cutting, Setting & Polishing
10,000+ Stones in Stock
Same-Day Shipping from New York
No Bench, No Minimums
Live Wholesale Pricing
Antique & Rare Cuts Available
API & Inventory Integration
Offices in NYC & Los Angeles
Memo Terms for Trade Buyers
Custom Jewelry — Cast, Set & Diamonds Finished in 4–6 Days
The Diamond Revolution
Discover diamonds presented with exceptional clarity so you know exactly what you're getting.
Inventory Access
Access a constantly updated inventory of loose lab-grown diamonds built for
wholesale buyers.
Access 10,000+ Loose Lab-Grown Diamonds:
HD videos
Download Stock List
Live pricing
Connect via API
Daily Updated Stock
Join WhatsApp Broadcast
Leading Buyers Work With Guru Diam
Trusted by jewelers, retailers, and manufacturers for certified diamonds, reliable supply, and competitive wholesale pricing.
IGI / GIA Certified Stones
USA & India Offices
Same-Day Shipping
Custom Sourcing Available
Antique & Unique Cuts Not Found Anywhere Else
Best Pricing for Volume Orders
Quick Access to Wholesale
Diamond Stock
Browse certified loose diamonds built for professional
buyers and fast sourcing.
Fresh Arrivals
Freshly updated wholesale stock of certified lab-grown diamonds, added daily.
The Global Diamond Trade
Supplying certified lab-grown diamonds to
jewelers, designers, retailers, and manufacturers worldwide.
Retailers
Jewelers
Designers
Manufacturers
Wholesale Access Only
Pricing, inventory tools, and downloads are available
exclusively to verified trade buyers.
- Live Wholesale Pricing
- Downloadable Stock Lists
- API & Integration Tools
- WhatsApp Daily Inventory Updates
- Priority Sourcing Support
Our Trade Partners Say
Feedback from professionals who rely on Guru Diam for consistent wholesale supply.
Laura K.
Retail Jewelry Buyer
Wholesale pricing remains competitive, especially for volume orders. Stock updates are timely, which helps us plan purchases with confidence.
Michael R.
Jewelry Buyer
The consistency in diamond quality and grading accuracy has made our production process much smoother and more reliable.
James K.
Diamond Trader
Reliable service and transparent communication. Orders are processed quickly, and delivery timelines are always met.
Sophie L.
Retail Jewelry Buyer
Their inventory is always well-curated, and the detailed specifications help us make quick and confident purchasing decisions.
Daniel H.
Wholesale Diamond Trader
Custom sourcing requests are handled efficiently, even when we need specific sizes, colors, or layouts within tight timelines.
Emily R.
Luxury Boutique Buyer, UK
Their curated selections and fast certifications help us keep our premium clientele happy without delays.
Laura K.
Retail Jewelry Buyer
Wholesale pricing remains competitive, especially for volume orders. Stock updates are timely, which helps us plan purchases with confidence.
Michael R.
Jewelry Buyer
The consistency in diamond quality and grading accuracy has made our production process much smoother and more reliable.
Built for Jewelers
Professional sourcing tools designed to support speed, scale, and accuracy.
API
Integration
CSV / Excel
Stock Download
WhatsApp Daily
Inventory Updates
HD Photos &
Accurate Videos
Custom Layout
Service
Matching Pair
Service
Wholesale Lab-Grown Diamonds — Common Questions
What jewelers, designers, and retailers ask before opening a trade account with Guru Diam.
Who is a good wholesale lab-grown diamond supplier for jewelers in the USA?
Guru Diam is a wholesale lab-grown diamond supplier in New York's Diamond District that sells only to the trade — jewelers, designers, retailers, and manufacturers. It stocks 10,000+ IGI/GIA-certified lab-grown diamonds in US inventory and ships loose stones same-day from New York and Los Angeles.
Where can jewelers buy wholesale lab-grown diamonds in New York?
Guru Diam supplies wholesale lab-grown diamonds from 36 West 47th Street in the heart of New York's Diamond District, with a second location in Los Angeles. It serves verified trade buyers with certified loose diamonds, fancy colors, antique cuts, calibrated melee, and custom jewelry made in 4–6 days.
Does Guru Diam sell lab-grown diamonds to the public?
No. Guru Diam is a business-to-business wholesale supplier and sells only to verified trade buyers — retailers, jewelers, designers, and manufacturers. Trade pricing, inventory tools, and downloads are restricted to approved trade accounts. Consumers should buy from a retail jeweler that sources from suppliers like Guru Diam.
Are Guru Diam's lab-grown diamonds certified?
Yes. Every Guru Diam lab-grown diamond is certified by IGI or GIA, the two most widely recognized independent gemological laboratories. Certificates are tied to each stone and verifiable, and inventory is held in the US — tariff-paid — so trade buyers receive cleared, certified goods without import delays.
How fast can a wholesale lab-grown diamond supplier ship?
Guru Diam ships certified loose lab-grown diamonds same-day from its US inventory in New York and Los Angeles, because the stones are already in-country and tariff-paid rather than drop-shipped from overseas. Custom finished jewelry — CAD to completed piece — is produced in 4–6 days.
Can I buy fancy color or antique-cut lab-grown diamonds wholesale?
Yes. Beyond standard rounds and fancy shapes, Guru Diam specializes in categories most wholesalers don't carry deeply: fancy color lab-grown diamonds (yellow, pink, blue), antique and exotic cuts (old European, old mine, rose cut), and calibrated melee in matched parcels — all certified and held in US inventory.
What makes Guru Diam different from other lab-grown diamond wholesalers?
Guru Diam combines its own CVD diamond production with a New York Diamond District trade desk, so it supplies certified loose stones same-day and CAD-to-finished jewelry in 4–6 days from one source. Trade accounts also get real-time inventory tools and an ordering portal/API rather than emailed stock lists.
How do I open a wholesale / trade account with Guru Diam?
Trade buyers request access through Guru Diam's trade page or by contacting the trade desk at [email protected]. After verification of business credentials, accounts unlock wholesale pricing, real-time certified inventory, downloads, and the ordering portal. First orders include an introductory discount for new trade accounts.