black diamond

Black Onyx: Meaning, Properties, Uses

As George Eliot said, “These gems have life in them: their color speak, say what words fail of ” Black […]

Black Sapphire is a mineral variety of the Corindón group. In ancient times any blue gemstone was called sapphires. Currently, corundum

Black spinel is a gemstone made of magnesium oxide and magnesium-aluminum oxide. It is one of the rarest and most