RUBY

           
 
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Los Angeles, CA 90014

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RUBY
Gemstone:
Shape:
Weight (ct):
 to
 
 
Ruby Facts
Category Mineral
Chemical formula (Mg, Fe)2SiO4
Identification
Color Red, may be brownish or purplish
Crystal habit Varies with locality. Terminated tabular hexagonal prisms.
Crystal system Trigonal
Cleavage No true cleavage
Fracture Uneven or conchoidal
Mohs Scale hardness 9.0
Luster Vitreous
Refractive index ~1.762-1.770
Pleochroism Orangey red, purplish red
Ultraviolet fluorescence red under longwave
Streak white
Specific gravity 4.0
Melting point 2050°C
Solubility none
Diaphaneity transparent