Big lab-grown diamonds, 3 to 40 carats
Centre and statement stones for bridal, high jewelry and collectors' pieces. IGI graded, filmed before you commit, in singles and matched pairs.
Trade supply. For jewellers, wholesalers, manufacturers and brands. Orders from US$2,000, quoted within one business day.
Size ranges we supply
How buyers typically use each range. Every size is available in white and in fancy colour.
| Carat | Typical use | Popular shapes | Availability |
|---|---|---|---|
| 3 – 5 ct | Bridal centre stones, three-stone rings, statement studs | Oval, radiant, elongated cushion, pear, emerald | Usually in stock |
| 5 – 10 ct | Cocktail rings, pendants, high-end bridal | Emerald, radiant, oval, pear | Stock and short lead time |
| 10 – 20 ct | High jewelry, showpieces, display stones | Emerald, radiant, cushion, pear | Selected stock, grown to order |
| 20 ct + | Collector and exhibition pieces | Emerald, radiant, pear | On request |
Big stones in stock today
A rotating selection with trade prices. Hover or tap a photo for the 360° view.
You see the exact stone before you pay
A big stone is a big decision for your customer. We make it easy to judge from a distance.
- High-resolution photos and a 360° video of the stone you will receive, not a sample.
- Filming on request in daylight, under UV, or next to a ruler for scale.
- Grading report shared before invoicing, with the number you can verify online.
- Measurements, depth, table and ratio on every quote so you can check fit against a setting.
Matched pairs and three-stone sets
Pairs matched for colour, clarity, measurements and make, from 2 ct each. Side stones for three-stone rings can be cut to fit your centre stone.
Send the centre stone's measurements, or a stone reference from our catalogue, and we will propose matching pairs or sides with video of the set together.
Ask for a matched pairWhat decides the price of a big stone
Carat drives price more steeply above 3 ct. These are the levers buyers use to hit a budget.
Carat thresholds
Prices step up at round weights. A 4.90 ct can look the same as a 5.02 ct face-up and cost noticeably less.
Colour and clarity
In big stones colour shows more. G–H with VS clarity often gives the best value; D–E is chosen for top bridal.
Shape
Elongated shapes like oval, pear and radiant look larger per carat than rounds and cost less than rounds of the same weight.
Make
Excellent polish and symmetry and a sensible depth keep a big stone lively. We flag stones with deep or shallow proportions.
Grading lab
IGI is standard. GIA grading adds time and cost but helps with some retail customers.
Lead time
Stock stones ship fastest. Growing to order suits exact specs and larger sizes.
Free for trade buyers
Get today's full stock list
All 2,423 lab-grown stones in one spreadsheet: shape, carat, colour, clarity, report number and trade price. Opens in Excel or Google Sheets. Updated daily.
Planning a large or repeat order?
Parcels, matched layouts, monthly supply programmes and private-label lines. Send the brief and our trade desk replies with a costed proposal, matching stones with video and reports, and a delivery date — before you pay anything.
- Pro-forma invoice, bank transfer
- Insured door-to-door delivery
- Specs kept on file for reorders
Big diamond questions
Short answers to what buyers ask before their first order.
Not covered here? Ask on WhatsApp or send an enquiry.
What counts as a big diamond?
For our trade buyers, anything from 3 ct upward. Most requests fall between 3 and 10 ct; we also supply 10–20 ct and statement stones of 20–30 ct.
Are big lab-grown diamonds certified?
Yes. Big stones are supplied with an IGI grading report as standard, and GIA grading can be arranged. The report number verifies on the lab's own website.
Can I see the stone before paying?
Yes. We send high-resolution photos and a 360° video of the exact stone, and can film it next to a ruler, under daylight and under UV if you need.
Do you supply matched pairs of big stones?
Yes. Pairs are matched for colour, clarity, measurements and make, for earrings and three-stone designs. Pairs from 2 ct each are common; larger pairs are sourced to order.
How long does a big stone take if you don't have it?
Common shapes and colours from 3–5 ct usually take days. Larger or unusual stones take longer because the rough has to be grown and cut; we give a date before you commit.
Is there a minimum order for big stones?
Our trade minimum of US$2,000 per order applies. Most single big stones exceed it on their own.
What colour and clarity do buyers usually choose?
For white stones, D–G colour with VVS–VS clarity covers most bridal and statement demand. For fancy colours, Fancy Intense and Fancy Vivid dominate big-stone requests.
Tell us the big stone you need
Shape, carat range, colour and clarity, and whether you need a pair. We reply with matching stones, video and reports.
- You send the spec. Shape, size, colour, clarity, quantity, or a design brief.
- We shortlist. Matching stones or a costed proposal, with media and reports.
- You confirm. Invoice, payment, then insured delivery to your door.
Trade supply. For jewellers, wholesalers, manufacturers and brands. Orders from US$2,000, quoted within one business day.
