1.55ct Marquise SI1 G 12.61 x 5.90 x 3.68mm LG Diamond w/ IGI

A cultured, or lab-grown, diamond is essentially the same thing as a natural diamond. A cultured diamond is chemically and physically a diamond. Cultured diamonds have the same thermal and electrical conductivity as mined diamonds.
Since cultured diamonds are essentially the same as natural diamonds, they have the same properties and the same ranking of 10 on the Mohs scale.
The differences between Natural Diamonds and Cultured Diamonds cannot be seen with the naked eye. Since a cultured diamond appears identical to a mined diamond, most jewelers won't be able to tell the difference. So, they will pass a diamond tester exam.
Cultured diamonds are an ethical choice. The extraction of diamonds from the earth is fossil fuel intensive, environmentally damaging, and becoming less sustainable every year. Diamond mines are some of the largest holes ever dug in the Earth, requiring immense amounts of fossil fuels to extract the gemstones with heavy machinery. Not to mention, mined diamonds have a controversial history that is tied to the use of child labor in some African diamond mines as well as sales of illegally traded “conflict diamonds” that fund conflict in war-torn areas.
All in all, you can rest safe knowing that cultured diamonds are a brilliant, ethical, and beautiful choice.