Alstonite with Calcite, Fluorite

specimen number:
7992719

location:
Minerva mine #1, Hardin Co., Illinois, USA

description:
Colorless pyramidal crystals of alstonite measuring to 0.2 cm in size along the top edge of this crystallized calcite and fluorite cluster. Neatly fluorescent under longwave ultraviolet light. Some of the calcite crystals to show cleaving. A good rich example for alstonite from this locality. Previous label from the collection of Roy Smith as shown at the end of the video.

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