24 kg / 2 lb 12 ounces

5 on the Mohs scale

8 gram Impact Breccia

Its dimensions are 35x25x15 mm

Calcite on Calcite Crystal Cluster | 64g | Oskaloosa, Mahaska County, Iowa, USA Adamite 24 kg / 2 lbThis is a natural cluster formation of calcite on calcite crystals or two variations of the mineral found in a cracked concretion in a coal mine in Oskaloosa, Mahaska County, Iowa, USA. It is a specimen consisting of two types of calcite on matrix. The first type is a coating of iridescent, dark calcite on the matrix. The second type are white crystals of calcite. It is in good condition. Would be a nice addition to any new or existing collection.