As the hardest material on earth, ground diamond dust is an exceptional exfoliant. Also, they sparkle! Diamond dust-infused products give the immediate effect of added luminosity thanks to their ability to reflect light.
Now there are new products containing black diamonds. These mystery diamonds, also called carbonados, are black carbon formations similar to diamonds. Their high hydrogen content suggests they may be from outer space. Because they are only found in Brazil and Africa, it’s possible they came on asteroids.
Dr. Sam Bunting, a London-based cosmetic dermatologist, explained that diamonds, precious metals and gemstones create an optical blur. “They diffuse the light and create a soft-focus effect, which potentially hides fine lines and wrinkles. But that’s a cosmetic effect, it’s not a permanent thing,” she said.
Bottom line: Are diamonds worth the money in your skincare? Diamonds don’t slow down aging or do anything for your skin except diffuse light on the surface. You can do that with makeup. So I would say probably not.