Wholesale Natural Diamonds
Certified loose natural diamonds for jewelers, retailers and manufacturers: ovals, emerald cuts, pears, cushions, rounds and antique cuts, each with its GIA or IGI report. Natural melee in stock too.
2.51 ct oval · G SI1 · GIA
Featured certified natural diamonds
A few natural diamonds in stock today, each with its own page, 360° video and report.
1, 2 and 3 carat natural diamonds
| Carat | In stock | Shape pages |
|---|---|---|
| 0.50–0.69 ct | In stock | Round |
| 0.70–0.89 ct | In stock | Old Miner |
| 0.90–0.99 ct | In stock | All shapes |
| 1.00–1.49 ct | 100+ | Oval, Emerald Cut, Pear, Cushion, Round, Asscher, Heart, Radiant Cut, Princess, Marquise, Old Miner |
| 1.50–1.99 ct | 50+ | Oval, Emerald Cut, Pear, Cushion, Round, Heart, Radiant Cut, Old Miner |
| 2.00–2.49 ct | 100+ | Oval, Emerald Cut, Pear, Cushion, Round, Asscher, Heart, Radiant Cut, Princess, Marquise |
| 2.50–2.99 ct | 10+ | Oval, Emerald Cut, Cushion, Round, Marquise |
| 3.00–3.99 ct | 50+ | Oval, Emerald Cut, Pear, Cushion, Round, Radiant Cut, Marquise |
| 4.00–4.99 ct | 10+ | Oval, Cushion, Round, Radiant Cut |
| 5.00+ ct | 10+ | Oval, Emerald Cut, Pear, Cushion, Round |
Natural and lab-grown, kept separate
Both are real diamonds with the same hardness and sparkle. Natural diamonds formed in the earth; lab-grown diamonds are grown in a lab. We carry both and never mix them in one listing.
Natural · 1.21 ct princess · GIA
Lab-grown · princess · IGI
Stating natural origin. You are here.
Primarily CVD. See lab-grown diamonds →
A natural diamond supplier that works like your back office
Jewelers, retailers and manufacturers buy from us.
Every natural certified diamond has its report.
Orders before 6 PM ET ship the same day.
Order one diamond or a full parcel.
For approved trade accounts.
A dedicated contact for every trade account.
We source diamonds that are not in stock.
Visit by appointment.
Wholesale loose natural diamonds from 47th Street
Guru Diam sells certified natural diamonds wholesale to the trade from our office at 36 W 47th St in New York's Diamond District and from Los Angeles. Every certified natural diamond carries a GIA or IGI report, so you can check grading before you buy: GIA report check or IGI verify.
Most of our loose natural diamonds are 1 to 3 carats in ovals, emerald cuts, pears, cushions and rounds, with old mine cut and old European cut diamonds for antique-style rings and natural melee for pavé and halos. Need a diamond we do not list? We source to your specification.
Prices are shown to trade accounts only. Open a trade account (approved the same business day before 4 PM ET), set a ring in our custom jewelry workshop, check sizes in the diamond size chart, or read about Guru Diam.
We also carry certified lab-grown diamonds
IGI and GIA certified lab-grown diamonds, matched pairs, fancy colors and melee, listed separately from natural.
Shop lab-grown diamondsNatural diamond FAQ
Is every natural diamond certified?
Yes. Each natural diamond on this page has a GIA or IGI report. Open the diamond page for the report number and verify it on the lab’s website.
How fast do you ship?
Orders placed before 6 PM ET ship the same day. International delivery takes 3–4 business days.
Can you find a natural diamond that is not listed?
Yes. We source diamonds to your specification. Send the shape, size, color and clarity on WhatsApp.
How do I see prices?
Prices are for the trade. Sign in, or open a trade account: approval is the same business day if you apply before 4 PM ET.
What is the difference between natural and lab-grown diamonds?
Both are real diamonds with the same hardness and sparkle. Natural diamonds formed in the earth; lab-grown diamonds are grown in a lab. We list them separately and never mix them in one listing. See our lab-grown diamonds.
Buy natural diamonds at trade prices
3,000+ trade accounts already buy from our New York and Los Angeles offices.