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RUBY MINERAL                NATURAL COLOR             Hardness 9
 

 
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Ruby, natural crystal   10 grms.  

20.4 x 14.8 x 13.2 mm ( triangles on the heads )
USD 115 .00    ref RUmi10gr
                 
Hardness: 9
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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