This one's a bit unusual for much of the material collected from along the roads in the Black Wonder District in the Diablo Range in Northern California. It appears to have small cubes of calcite in portions of the specimen. Very little is known about the make up of this material and similar material is under testing to determine what's really here. For now, it's calcite and unknowns. Shown in LW, SW, MW and natural. About 3 inches tall or so.