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RUBY MINERAL              NATURAL COLOR             Hardness 9
 

 

RETURN TO RUBY MINERAL

Corundum is composed of pure alumina; its colouring is due to metallic

oxide traces or inclusions. The color of ruby is due to chromium oxide.
Gems are generally found in alluvium, but come either from basaltic slags, or from metamorphic marble.
       
Ruby, natural crystal 74.65 cts. /   19.5 x 16.5 x 17.8 mm.
USD 128.00 

ref RUcrs7465c

Hardness: 9 Ruby discovery
Specific Gravity: 3.9 - 4.1
Refractive Index: 1.76 - 1.78 Corundum data
Chemical Composition: Al2O3, Aluminum Oxide   Ask a question
Crystal Structure: Trigonal
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