Feldspar is an aluminosilicate mineral with potassium, sodium and calcium as the main chemical components. Feldspar has glass luster and pearl luster, 투명에서 반투명으로, usually colorless, 하얀색, light brown, green and blue Green is very rare in the feldspar family that can achieve good gem quality. Only feldspars with transparent crystals, bright colors and [...]
