This intriguing stone is more a charcoal grey than pure black, and some pieces are partially translucent. But its most salient feature is the confetti-like sprinkling of silvery pyrite throughout the stone and across its surface. The larger bits of pyrite catch the light and gleam, while the smaller flecks twinkle as you move the stone. Plus, it's quartz, with all of quartz's positive features, including hardness and durability. Note: Due to the reflectiveness of these stones, they are very difficult to photograph. Your best bet is to picture all the white and light grey speckles as silver, because that's how they look in person.