Calcite - , China - 7, 4.5 and 4 cm in edges, 10 cm of maximum length.

Mineral: Calcite
Locality: China
Dimensions: 7, 4.5 and 4 cm in edges, 10 cm of maximum length.

Description: At the backside the edge is a broken line with a small portion running parallel to long rhombohedral edge. Crossing edge forms an angle of 50.5º (maybe some tenths up/down) with the rhombohedral edge. Faces at one and another side of crossing edge form a 5.5º angle (maybe a few tenths up/down).