This is not a showy rock, though if you like Michigan minerals, it is quit special-- datolite CRYSTALS. Datolites from the Upper Peninsula are not uncommon, but almost all of them occur as nodules of varying color and patterns from various localities, all with different levels of desirability. Crystals however, are much less common. This is a cabinet specimen from an old collection, the vuggy display face is covered with small pinkish crystals.