Pete Mackey's exhibit.

Another view of some of Pete Mackey's specimens.

Wollastonite (orange), calcite (reddish-orange), willemite (green), esperite (yellow) and margarosanite (blue-white).

Margarosanite (blue-white) with minor willemite (green).

Esperite (yellow) and willemite (green) with minor calcite (red).

Barite (cream) in calcite (reddish-orange).

Wollastonite (orange) in calcite (reddish-orange).