There are two minerals in this group. They are fairly easily discriminated. Although neither has cleavage, one often has conchoidal fracture. Also, it is usually white or colorless although rarely it can be light pink, purple, black or yellow. If your unknown specimen fits this description, CLICK HERE. The second mineral is often dark red, but can be green or brown. It may occur as 12-sided (dodecahedral) crystals. If your unknown specimen fits this description, CLICK HERE. If neither description fits, try going back to Step 4 or Step 3