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Wholesale natural and lab-grown diamonds and fine jewelry for the trade, NY & LA

The diamond and the setting. One house.

Wholesale diamonds and custom jewelry manufacturer for the trade: certified natural and lab-grown diamonds, and finished jewelry cast, set and polished in 4–6 working days from approved CAD.

Browse live inventory See the jewellery

Same-day dispatch · 6pm ET New York cut-off

Emerald-cut diamond solitaire ring with pavé shoulders, made to order
The setting Emerald-cut solitaire
Made to order
CertificationIGI · GIA · GCAL (0.30ct+)
Same-day shipOrders before 6 PM ET
InventoryIn-house
Made to orderFine jewellery in 4–6 days
01 — Shop by section

Wholesale Diamonds for the Trade

Loose diamonds, lab-grown and natural, finished jewelry and wholesale lab-grown melee diamonds, all for the trade. Read our guides to calibrated melee for pavé, tennis and eternity work and matched pairs of lab-grown diamonds.

Emerald cut certified lab-grown diamond Lab-grown Certified lab-grown diamonds IGI and GIA certified, every diamond with its own page and 360° video. Shop now Fancy pink lab-grown diamond Lab-grown Fancy color diamonds Pink, yellow, blue and green, graded for color and intensity. Shop now Old Miner cut diamond Natural Certified natural diamonds GIA and IGI graded natural diamonds, including Old Miners and antique cuts. Shop now Matched pair of trillion diamonds Lab-grown Matched pairs Side diamonds matched for size and color, ready for three-stone rings. Shop now Radiant cut eternity band in yellow gold Fine jewelry Wholesale jewelry Rings, bands, earrings and bracelets, or any design made in your metal and size. Shop now
02 — Shop by shape

Certified lab-grown diamonds by shape.

All shapes
Round 1,000+ Emerald Cut 500+ Old Miner 500+ Cushion 500+ Hexagon 500+ Radiant Cut 500+ Oval 100+ Princess 100+ Pear 100+ Moval 100+ Marquise 100+ Criss Cut 100+
03 — Popular sizes

The sizes jewelers order most.

1 carat Round lab-grown diamonds 1.00–1.49 ct Round 100+ in stock 1.5 carat Oval lab-grown diamonds 1.50–1.99 ct Oval 50+ in stock 2 carat Round lab-grown diamonds 2.00–2.49 ct Round 100+ in stock 2 carat Oval lab-grown diamonds 2.00–2.49 ct Oval 10+ in stock 3 carat Emerald Cut lab-grown diamonds 3.00–3.99 ct Emerald Cut 10+ in stock 5 carat+ Old Miner lab-grown diamonds 5.00+ ct Old Miner 100+ in stock
How big is it? See the diamond size chart mm to carat for every shape, measured from our own inventory. Open the size chart
04 — New arrivals Newest in stock

Just in: diamonds and jewelry.

The latest certified lab-grown diamonds to reach our New York and Los Angeles offices, and finished jewelry from our trade catalog.

05 — Inventory Live stock · updated continuously

Today's inventory, live.

A constantly updated stock of certified CVD-grown loose diamonds, built for professional buyers.

View full inventory
Fresh Arrivals
API Integration
Pipe live stock straight into your systems.
Download Stock List
Full inventory as CSV or Excel.
WhatsApp Daily Inventory
Fresh arrivals to your phone each day.
HD Video & 360°
See every diamond in full motion.
06 — Fancy Color

Color, independently graded.

Fancy yellow, pink, and green — each diamond graded on its own merit, sourced and certified the same as every diamond in the house.

07 — Jewellery

We don't just supply the diamond — we set it.

Fine jewellery made to order — tennis, eternity, climbers, solitaires — finished in as little as 4–6 days.

Climber drop earrings in 18K white gold, emerald cut with pavé
Climber Drop Earrings 18K White Gold
Old-mine cushion solitaire ring in 18K yellow gold
Cushion Solitaire 18K Yellow Gold
Round brilliant diamond stud earrings
Diamond Studs Made to order
Radiant cut diamond eternity band in 18K yellow gold
Radiant Eternity 18K Yellow Gold
Ear drops in 14K yellow gold
Ear Drops 14K Yellow Gold
Lariat necklace in 14K white gold
Lariat Necklace 14K White Gold
Diamond tennis bracelet
Tennis Bracelet Made to order
Band Bracelet Earring Necklace Pendant Ring Watch Engagement Ring
Explore the Jewellery Design Your Own
08 — Custom

Send your CAD. We cast, set, and finish it.

Your outsourced jewellery studio - no bench, no minimums. Any CAD file becomes a finished piece in 4-6 days, shipped from New York or Los Angeles.

Start a Custom Order See the Jewellery
Finished fine jewellery made to order — pendant, ring, studs and tennis bracelet
CAD → Cast → Set → Finished
Made to order · 4–6 Days · NY & LA

One house. Every diamond tells a different story.

Other 2.01ct E VS1 antique-cut loose diamond 360° Other · 2.01ct
Old Miner 2.51ct D VS1 antique-cut loose diamond 360° Old Miner · 2.51ct
Moval 1.14ct D VVS2 antique-cut loose diamond 360° Moval · 1.14ct
09 — Rare Cuts

Cuts you won't find anywhere else.

Antique and exotic shapes, cut to order — each one graded and certified like every other diamond in the house.

Old Mine Old European Rose Portuguese Hexagon Kite Lozenge Shield Step
Euro Cut 4.06ct E VS1 antique-cut loose diamond 360° Euro Cut · 4.06ct
Marquise Step Cut 4.61ct D VVS2 antique-cut loose diamond 360° Marquise Step Cut · 4.61ct
Criss Cut 1.85ct E VVS2 antique-cut loose diamond 360° Criss Cut · 1.85ct
Explore Rare Cuts
10 — Journal

From the trade floor.

Notes on sourcing, certification, and how the jewellery side of the house actually gets made.

Read the journal
Custom Jewelry Manufacturer in Los Angeles (Jewelry District)
Oct 2026 · 3 min read
Custom Jewelry Manufacturer in Los Angeles (Jewelry District)
Read the article
How Much Does Custom Jewelry Cost Wholesale? (2026 Price Guide)
Oct 2026 · 5 min read
How Much Does Custom Jewelry Cost Wholesale? (2026 Price Guide)
Read the article
All Articles
More from the trade floor
View all
11 — Why Guru Diam

Why the trade works with us.

01

IGI, GIA & GCAL Certified

Every loose diamond 0.30ct and up ships with an IGI, GIA, or GCAL grading report.

02

New York & Los Angeles

Two coasts, one house - viewable and shippable from both offices.

03

Custom Sourcing & Layouts

Sourced to your spec, including full matched layouts on request.

04

Matched Pairs

Calibrated pairs and parcels selected for tone, cut, and proportion.

05

Memo Terms for Trade

Flexible memo terms for verified jewellers, retailers, and manufacturers.

06

CVD-Grown, QC to DEF+/VS+

Calibrated melee parcels held to DEF+ color and VS+ clarity.

Graded by — IGI GIA GCAL
Trade Access

Wholesale access for verified trade.

Live pricing, downloadable stock, API tools, and daily WhatsApp inventory — for verified jewellers, retailers, designers, and manufacturers.

Request Wholesale Access Book an Appointment
Elongated cushion-cut loose diamond on navy velvet
Sophisticated simplicity for the independent mind.
Guru Diam · New York & Los Angeles