Calcite on Quartz (variety chalcedony) - , USA - geode is 9 cm. the calcite is 6 cm.

Mineral: Calcite on Quartz (variety chalcedony)
Locality: Monroe County, Indiana, USA
Dimensions: geode is 9 cm. the calcite is 6 cm.

Description: Pink calcite on blue chalcedony As above. The pink calcite is a complexly hoppered rhombohedral crystal with 3 distinct terminations