Dogtooth calcite clusters are from Utah. Colors will be dark gray to brown with some having a cystallized crust (druse). Individual sharp pointed or dogtooth crystals will vary from approximately 1/2" -2" plus. Sizes of the calcite clusters will run from 5 to 25 pounds each. Pictured to the left is a 19 pound sample of dogtooth calcite cluster from Utah. The color is a dark gray.