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IGI & GIA Certified 10,000+ Stones in Stock Same-Day Shipping Live Wholesale Pricing Antique & Rare Cuts API Integration NYC & TEXAS Offices Memo Terms for Trade IGI & GIA Certified 10,000+ Stones in Stock Same-Day Shipping Live Wholesale Pricing Antique & Rare Cuts API Integration NYC & TEXAS Offices Memo Terms for Trade
Upcoming Shows

Meet us on the floor this fall.

01 Shapes

The Diamond Revolution

Discover diamonds presented with exceptional clarity so you know exactly what you're getting.

Round cut lab-grown diamond
01 / 09 Round Diamond
02 Fancy Color

Color, independently graded.

Yellow, pink, blue and green. Every stone is graded on its own merit and certified the same way as every white diamond in our vault.

Pear cut fancy green lab-grown diamond Heart cut fancy yellow lab-grown diamond Radiant cut fancy pink lab-grown diamond Oval cut fancy yellow lab-grown diamond Oval cut fancy brown lab-grown diamond Heart cut fancy blue lab-grown diamond
03 Fine Jewelry

We don't just supply the stone, we set it.

Tennis, eternity, climbers and solitaires, made to order with our own certified diamonds and finished in as little as 4 to 6 days.

Explore the jewelry Design your own
  1. 01StoneFrom our own certified vault
  2. 02CADRender in 24 hours
  3. 03Cast & setIn house, by hand
  4. 04FinishedReady in 4 to 6 days
Shop by category
Bangle Bracelet Earring Engagement Mens Ring Necklace Pendant Wedding Bands
04 The C6 Promise 01/04

The C6 Standard

The Signature of Prestige

Each creation carries an unmistakable identity. Crafted from the finest materials with meticulous attention to detail, every piece stands as a lasting emblem of elegance, power, and permanence.

The C6 Standard

100% Certified

From Seeds To Jewelry — All In-House

Affordable Luxury & Sustainable Choice

Jeweller setting a stone in a ring

Customize Your Jewelry

Follow a four-step process to create a one-of-a-kind jewelry piece according to your preference and style.

Book Virtual Appointment

Whether you need help, our jewellery specialists are here to assist you.

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Specialist presenting a ring in a box
05 @c6diamonds

See the sparkle in motion

Real stones, real light, filmed in our studio. Tap any reel to watch it with sound — or book a virtual appointment to see your diamond live.

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06 Just landed

Fresh Arrivals

A new hand-picked edit from our studio every time you visit — refresh to discover more.

View all designs