Mineral Specimen #4535 Calcite coated with Bitumen, Fluorite
Hardin Co., Illinois
10.8 x 5.8 x 3.4 cm
Sold
1960s
Odd, compound Calcite crystals are partially coated with hydrocarbons. The ends of two of the largest of the crystals end in flat surfaces which are casts after Fluorite crystals and have the richest deposits of the black hydrocarbons. There is one well formed, cubic Fluorite crystal which is a pale yellow color. This crystal has inclusions of Chalcopyrite crystals and small, white Barite crystals on its surface. There is Fluorite present which is pale blue in places.
Condition: Fairly Good
Flaws: Near the middle of the specimen, there is a broken and missing Clacite crystals. There are also a few small chipped/bruised places.
This mineral is also found in the following galleries: Minerals From Mexico | Calcite | Beryl | Fluorite | Minerals Priced Between 25 and 49 Dollars