Brilliant Earth is an American company that sells jewelry featuring diamonds and other gemstones that are asserted to be ethically sourced. The company was established in August 2005 by Beth Gerstein and Eric Grossberg, and is headquartered in San Francisco, California. According to Businessweek, the company has been influential in creating a market for ethically sourced jewelry. Some provenance claims were disputed as per a 2017 The Next Web article. Wikipedia