Ruby Crystal And Gems
by Natural History Museum, London/science Photo Library
Title
Ruby Crystal And Gems
Artist
Natural History Museum, London/science Photo Library
Medium
Photograph - Photograph
Description
Ruby crystal and gems. Rubies are the red variety of the mineral corundum, which is itself a crystalline form of aluminium oxide with traces of iron, titanium and chromium. The red colour of a ruby is caused mainly by the presence of chromium.
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September 16th, 2018
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