Calcite on Calcite Crystal Cluster | 64g | Oskaloosa, Mahaska County, Iowa, USA Mesosiderite Some workers have suggested that

Some workers have suggested that the rocks are frictionites (fused rocks from landslide heating)

Approx Weight (per piece):  1

Dimensions: 69x61x48 mm / 2

Product Type: Two Sided 925 Sterling Silver Pendant (20" silver plated chain included)

Its dimensions are 99x63x7 mm

Calcite on Calcite Crystal Cluster | 64g | Oskaloosa, Mahaska County, Iowa, USA Mesosiderite Some workers have suggested thatThis 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.