Sunday, March 20, 2016

Celestite


Celestite
My first glance, that of the uninitiated, told me that the brown substance was Celestite, aka Celestine.  As I read about it, I came to realize that the blueishly striated and clear parts were Celestite.  

It came as a mounted sample.

Celestite
In addition to being found in California and New York, I learned that it is also found in Ohio.  Celestine crystals are found in some geodes. The world's largest known geode, a celestine geode 35 feet (10.7 m) in diameter at its widest point, is located near the village of Put-in-Bay, Ohio, on South Bass Island in Lake Erie. The geode has been converted into a viewing cave, Crystal Cave, with the crystals which once composed the floor of the geode removed. The geode has celestine crystals as wide as 18 inches (46 cm) across, estimated to weigh up to 300 pounds (135 kg) each.  Wikipedia

It is soft, 3.5 Mohs scale.  It is a good source of strontium, commonly used in fireworks and metal alloys.

Celestite
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