Calcite on Quartz

A cluster of tan , wafer-like crystals of calcite to nearly 4cm perched on clear quartz. The quartz reacts lilac to LW. There is no damage. The truncated termination in the center is complete, save for the central notch defining a likely contact with another crystal and a bit on the right side of the notch may be missing (very hard to tell). Purchased in 2001.

Locality: Cambokeels Mine, Eastgate, Weardale, England

Composition: calcium carbonate