woman hand holding shiny black carborundum crystal (moissanite or silicon carbide) on light background close up.

artificial background beautiful black carbide carbon carborandite carborundum close closeup colorful crystal crystals detail dioxide gem gemstone geological geology hand hands holding jewel lava light macro material meteorite mineral mineralogy moissanite natural nature quartz rainbow rare rock rough sample science semiconductor shiny silicon specimen stone synthetic technology texture titanium volcanic white woman