New York · 40+ yearsDiamonds
Loose certified diamonds in all shapes and sizes, from single center stones to matched pairs, layouts and calibrated melee for production.
- Center stones
- Matched pairs
- Layouts
- Melee
- Fancy shapes
Wholesale diamonds · 47th Street, New York
Certified stones, sourced with forty years of trust.
7 Star Gems manufactures, supplies and sources certified diamonds and fine colored stones for the trade. We also work directly with private clients on custom jewelry and source luxury watches by request.
40+ yearsin the diamond trade
47th StreetNew York Diamond District
Certifiedlab-graded diamonds and gems
Trade & privatewholesale and custom clients
What we do
Manufacturing, supply and sourcing under one roof.
Retailers, designers and manufacturers come to us for dependable goods and fast answers. Private clients come to us for a stone and a piece that is right the first time.
Colored stones
Sapphire, ruby, emerald and other fine gemstones, sourced to your color, size and origin requirements, with lab reports where applicable.
- Sapphire
- Ruby
- Emerald
- Special orders
Custom jewelry
Engagement rings, anniversary pieces and one-of-one designs for private clients. We select the stones and see the piece through from sketch to finished jewel.
- Engagement
- Bridal
- Redesign
- Private commissions
Luxury watches
High-end timepieces sourced by request or consultation. Tell us the reference you are after and we will put our network to work.
- By request
- Consultation
- Hard-to-find references
Speak our language
Give us the spec. We will find the stone.
Most trade requests start with shape, weight, color and clarity. The highlighted range below is where most of our center-stone requests fall. Send us yours, whether it sits inside it or not.
ColorGIA D-to-Z scale
ColorlessNear colorlessFaintVery lightLight
ClarityUnder 10× magnification
FlawlessVery, very slightVery slightSlightIncluded
Every diamond we supply as certified comes with its original grading report. Ask for the report number and verify it directly with the issuing laboratory.
Working with us
How a request moves.
Whether you are restocking a showcase or proposing next month, the path is the same.
01
Inquiry
Send the spec, the budget and your timing. A short note is enough to start.
02
Sourcing
We pull from our own goods and our trade network on 47th Street and abroad.
03
Review
You receive options with grading reports, photos and video to compare.
04
Delivery
Insured shipping to the trade, or a private appointment in New York.
Founder
Prakash Chauhan
Prakash Chauhan has spent more than four decades in the diamond business. He built 7 Star Gems with offices across the world, and has kept its center on 47th Street in New York.
Over that time he has built long-standing wholesale relationships with retailers, manufacturers and fellow dealers, and has worked one-on-one with private clients to design custom jewelry around the right stone.
That combination of trade depth and personal service is still how the company works today.
Inquiries
Tell us what you are looking for.
Trade buyers, designers and private clients are all welcome. Share as much or as little detail as you have, and we will follow up personally.
Office47th Street, New York, NY
Emailinfo@7stargems.com
HoursMonday to Friday, by appointment