Smoky Quartz
by Th Foto-werbung/science Photo Library
Title
Smoky Quartz
Artist
Th Foto-werbung/science Photo Library
Medium
Photograph - Photograph
Description
Smoky quartz crystals. Quartz (silicon dioxide) is colourless when pure, but impurities can impart a range of colours. It is thought the smoky colour arises from exposure to natural radioactivity.
Uploaded
September 20th, 2018
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