Fancy colour laboratory-grown diamonds
Fancy colour lab-grown diamonds, wholesale
Strong, consistent colour for designers, brands and jewellers, without the price of natural coloured diamonds.
Where the colour comes from
| Colour | Cause | Usual method |
|---|---|---|
| Yellow | Nitrogen in the crystal (Type Ib) | HPHT, as-grown |
| Blue | Boron in the crystal (Type IIb) | HPHT or CVD, as-grown |
| Pink and red | Nitrogen-vacancy colour centres | CVD with post-growth treatment |
| Green | Colour centres from treatment | Post-growth treatment |
| Champagne and brown | Growth-related colour | CVD, as-grown |
How fancy colours are graded
Laboratories describe fancy colour by hue (pink, blue, yellow) and intensity, on a scale that runs Faint, Very Light, Light, Fancy Light, Fancy, Fancy Intense, Fancy Vivid and Fancy Deep or Dark. Tell us the hue and intensity range you sell.
Disclosure
We tell you whether each stone's colour comes from growth or from post-growth treatment. Invoices and grading reports describe every stone as laboratory-grown.
Send us your requirement
Use the requirement form or email sales@intidiamonds.com with:
- Shape: round, oval, emerald, cushion, pear, radiant, princess, marquise, asscher, heart or others
- Carat range per stone, or total carats for a parcel
- Colour and clarity range
- Quantity, and whether you need matched pairs or calibrated sizes
- Grading reports, if you need them, and which laboratory
- Delivery country and the date you need the goods
We reply with what we have in stock and what we can grow for you.
Questions buyers ask
Is the colour in lab-grown fancy diamonds permanent?
Colour from trace elements, such as nitrogen in yellow and boron in blue, is part of the crystal and permanent. Colour from post-growth treatment, common in pinks, is stable in normal wear, but very high heat during jewellery repair can affect it, so tell your bench jeweller.
Can you match colours across a parcel?
Yes. Tell us the hue, intensity range and quantity and we will sort for consistency, or plan a production run for larger orders.
Do you disclose post-growth treatment?
Yes. Some CVD diamonds are treated after growth to improve colour. We tell you which stones are as-grown and which are treated, and independent grading reports note it.
Which grading laboratories do you work with?
We can supply stones with reports from IGI, GIA or another laboratory you prefer, or as ungraded parcels for melee and calibrated goods. Tell us your requirement when you enquire.