Appraisal Certificate Included - $75

8 gram Impact Breccia

This impactite was formed approx

Dimensions:  Specimen: 8x7x6 mm

5 on the Mohs scale

Calcite on Calcite Crystal Cluster | 64g | Oskaloosa, Mahaska County, Iowa, USA Adamite Appraisal Certificate Included - $75This 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.