Fluorite

Article Abstract:

Deposits of fluorite are found all over the globe. The better known sources being Mexico, Venezuela, Peru, England, Switzerland, Africa and China. Specially notable is the area of Cumberland, England. In addition, the State of Tennessee appears to be a current popular source.

Fluorspar

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Prehnite

Article Abstract:

Prehnites are the first mineral deposited in a lava gas pocket and frequently followed by non-zeolites including pectolite and epidote. Others may combine with common trap-rock companions. All prehnites occur as botryoidal, usually green and rough-surfaced.

Personal narratives, Minerals, Minerals (Geology), Mineralogical museums

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Tanzanite, anybody?

Article Abstract:

A discussion of the TV shopping transactions and marketing strategies of the gemstone Tanzanite is presented.

Methods, Marketing, Television advertising, Gems, Precious stones

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