Wholesale Lab-Grown Diamonds
Live inventory from our New York and Los Angeles offices. Every diamond has its own page with the photo, 360° video, grading report and full measurements.
Round1,000+
Oval100+
Pear100+
Cushion100+
Emerald Cut500+
Radiant Cut500+
Princess100+
Asscher100+
Marquise100+
Heart100+
Old Miner500+
Euro Cut100+
Moval100+
Hexagon500+
Kite100+
Criss Cut100+
Trillion100+
Hexagon Brilliant100+
Lozenge100+
Other50+
Portuguese50+
Pear Step Cut50+
Bullet50+
Triangle50+
Marquise Step Cut50+
Shield10+
Lily Cut10+
Oval Step Cut10+
Coffin10+
Rose Round10+
Baguette10+
Old Mine Oval10+
Octagon10+
Star10+
Horse10+
Trapezoid Step10+
Old Mine Pear10+
Padma10+
Cadillac10+
Half MoonIn stock
Calf CutIn stock
CarreIn stock
Square RadiantIn stock
CloudIn stock
BullIn stock
Tapered BaguetteIn stock
ButterflyIn stock
IcecreamIn stock
ChevronIn stock
Trapezoid BrilliantIn stock
AlphabetsIn stock
DuckIn stock
Diamond CutIn stock
XmasIn stock
Featured certified lab-grown diamonds
A few of the 5,000+ diamonds live today. Filter all of them by shape, carat, color, clarity and location on the certified page.
Graded by independent labs
The majority of our lab-grown diamonds are IGI certified. We also carry GIA and GCAL graded diamonds. Every report number links straight to the lab's own verification page.
CVD & HPHT
CVD (Chemical Vapor Deposition) diamonds are grown from a diamond seed in a controlled chamber using carbon-rich gas at moderate temperatures. This is Guru Diam's primary production method. HPHT (High Pressure High Temperature) diamonds replicate the natural conditions deep within the Earth using extreme pressure and heat.
Both methods produce real diamonds that are chemically, physically, and optically identical to mined diamonds.
Wholesale lab-grown diamonds for the trade
Guru Diam supplies loose lab-grown diamonds to jewelers, retailers, designers and manufacturers from offices in the NYC Diamond District (47th Street) and the Los Angeles diamond district. Our lab-grown production is primarily CVD, and certified diamonds carry IGI or GIA reports you can verify on the lab’s own site.
Browse certified lab-grown diamonds, matched pairs, lab-grown melee and fancy color lab-grown diamonds, or check sizes in the diamond size chart (mm to carat). Every diamond has its own page with photo, 360° video and full grading; sign in for trade prices.
We also carry certified natural diamonds
GIA and IGI graded natural diamonds, including Old Miners and antique cuts, listed separately from lab-grown.
Shop natural diamondsTrade questions
How do I see wholesale prices?
Wholesale pricing is visible only to approved, logged-in trade account holders. Once your account is set up, every diamond in our inventory displays its live wholesale price, including per-carat pricing and any applicable volume tiers. Log in or apply for a trade account.
Is there a minimum order quantity?
There is no strict minimum order for certified loose diamonds. You can purchase a single diamond or an entire parcel.
Can I reserve a diamond while I decide?
Yes. We offer both short-term and long-term memo services that let you hold or borrow diamonds before committing to a purchase.
Can I request specifications not shown in the inventory?
Absolutely. If you need a particular carat weight, color, clarity, or cut that isn't currently listed, our team can source or cut it to your exact specifications. Send your specs on WhatsApp at +1 (347) 812-2006.
Can I download your full stock list?
Logged-in trade account holders can export our full diamond inventory as a spreadsheet directly from the website. We also offer API integration for retailers and platforms that want to sync our live inventory feed. Message us on WhatsApp for API access.
How fast do you ship?
Orders placed before 6 PM ET ship the same day. International delivery takes 3–4 business days.
Can't find the exact diamond?
Message your shape, carat range, color and clarity. Our team sends matching diamonds, and alerts when new ones arrive.