- Datolite on Prehnite With Copper Inclusions
- Copper Falls Mine, Keweenaw Co., Michigan, USA
- Small Cabinet, 7.5 x 5.9 x 4.7 cm
- Ex. Ernest Schlichter
A copper country rarity! Glassy and gemmy, doubly terminated, colorless crystals of datolite, to 2 cm across, are partially colored with a coating of hematite. The datolite crystals are emplaced on balls of lustrous, light green prehnite, which measure 1.5 cm across.