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Because of its unusual propensity to collapse when heated
but it's not a true mineral because its composition is too complex and lacks the typical mineral crystalline structure
Weight: 365g Size: 97
Weight: 107g Size: 55mm x 44mm x 24mm
Calcite Cluster | 531g Green Fluorite Because of its unusual propensityWeight: 531g Size: 144mm x 77mm x 52mm All measurements are approximate
US$ 349.50
US$ 34.99
US$ 248.50
US$ 29.99