Colored lab-grown diamonds are laboratory-grown diamonds in blue, pink, red or yellow. Their color forms either during growth or through a treatment afterward, and the IGI report states both. At ANNARELLE you will find them in COULEUR, together with laboratory-grown rubies and sapphires.
A lab-grown diamond is not an imitation. It is made of pure carbon, has a hardness of 10 and is graded by IGI like any diamond. With colored stones, one more question comes in: where does the color come from?
How are colored lab-grown diamonds made?
The color forms in one of two ways: through traces of other elements during growth, or through a treatment after growth.
Traces of nitrogen turn a diamond yellow, traces of boron turn it blue. Pink and red usually come from a treatment of the finished stone under high pressure and high temperature. Blue stones can be treated this way too.
The process itself, CVD or HPHT, is the same as for white lab-grown diamonds. How both work is explained in Lab-grown diamonds: the smart choice.
What does the IGI report say for colored stones?
The IGI report names the growth process and notes whether a stone was treated after growth. Instead of the D to Z color scale used for white diamonds, it describes hue and intensity, for example Fancy, Fancy Intense or Fancy Vivid.
An example from our range: a blue lab-grown diamond, pear-shaped, 1.02 carat, color Fancy Vivid Blue. According to the report, it was grown by the CVD process, and the comments note indications of post-growth treatment.
For us, that is not a flaw but transparency. How to read and verify a report yourself: How to Verify an IGI Certificate.
How do I recognize a beautiful colored diamond?
By an even, clear color that holds up in daylight as well as in artificial light. With colored stones, color matters more than with white ones; a strong, even hue makes more impact than a large stone with a pale color.
Here too, the cut decides how the stone returns light. Many colored stones are cut in shapes such as pear, oval or cushion, because they show the color especially well. What lies behind cut, clarity and carat: The 4 Cs Explained.
Which colored stones does ANNARELLE offer?
In COULEUR you will find blue and pink lab-grown diamonds, lab-grown rubies and lab-grown sapphires, set in solid gold.
Delicate pieces make a good start: the Coeur heart pendant with a pink diamond (999 euros), the Coeur heart ear studs with a pink diamond (899 euros), the Celeste Fleur necklace with a blue diamond in a blossom shape (999 to 1,499 euros) and the matching Celeste Fleur ear studs (749 to 1,499 euros). Prices as of October 2026.
A blue stone also works as Something Blue for a wedding. You will find every piece in COULEUR.
Pour toujours.
