Material Guide
Lab-Grown Diamond
Lab-grown diamond
At ANNA DIAMOND, every diamond is a TYPE IIa quality lab-grown diamond.
Color is F grade or higher, clarity is VS class or higher, and cut is Excellent as standard.
It has the same brilliance, hardness, and chemical composition as a natural diamond, while also being an ethically transparent material.
What is a lab-grown diamond
A lab-grown diamond is grown in a laboratory that recreates the environment where natural diamonds form deep underground. Under high heat and high pressure, carbon slowly crystallizes in a process nearly identical to nature. Its brilliance, structure, and hardness are no different from a natural diamond.
Research into lab-grown diamonds began in 1956, when GE in the United States first succeeded in creating them.
Three reasons to choose them
1. An ethical brilliance
A cleaner choice, free from involvement in conflict, low-wage labor, child labor, and environmental destruction.
2. A dreamlike clarity
Many lab-grown diamonds fall into a rare grade called Type IIa. These are diamonds of very high clarity, making up less than 2% of natural stones.
3. A bolder choice
Thanks to lab-grown diamonds, diamonds have become just a little more within reach. For the same budget, you can choose a carat one rank higher.
How they are made
High Pressure High Temperature (HPHT)
High heat of 5000°F (about 2760°C) and very high pressure are applied, and with a metal catalyst, pure carbon crystallizes onto a diamond seed.
Chemical Vapor Deposition (CVD)
Hydrogen and methane gas are turned into plasma at high temperature, and within it, fragments of carbon are layered onto a diamond seed little by little and crystallized.
Quality standards, the 4C
| Standard | The ANNA DIAMOND standard |
|---|---|
| Carat | A wide range from 0.03ct to over 3ct |
| Color | F color and up (nearly colorless) |
| Clarity | VS class and up |
| Cut | Excellent |
Diamonds of 1 carat and above come with a certificate from an international grading laboratory (IGI, GIA).
ANNA DIAMOND and lab-grown diamonds
The ANNA in ANNA DIAMOND comes from the name of the younger sister of founder and designer Haruna Mori, who is ten years her junior.
Ten years from now, when her sister reaches the same age the designer is today, we hope to contribute in some small way to a society that shines ever more beautifully. It is with that wish that we gave the brand her name.
Believing that the world will surely shine more beautifully still.ANNA DIAMOND