Genuine Black Diamond Round Stud Earrings in Basket Setting. Total 1 CT (.5 CT each) No Chemicals or Color added. Heat Pressure High Temp treated. HPHT Diamonds are subjected to extremely high temp. and pressure in machines to enhance their color. This process moves the atoms inside the Diamond. Due to the nature of it's composition it may test as Moissanite. Slides are part of item description. Please ask all questions before purchasing. These Diamonds are Earth Mined and will Last Forever!