SAPPHIRE

 
 

Store Hours:
Mon-Sat 10:30AM - 5:30PM
 
PL GEMS, INC.
650 S. Hill Street, Booth D16
Los Angeles, CA 90014

Phone: (213) 623-2829, Fax: (213) 622-3414
Email: plgems@gmail.com
Website: www.plgems.com

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SAPPHIRE
Gemstone:
Shape:
Weight (ct):
 to
 
 
Sapphire Facts
Category Mineral
Chemical formula (Mg, Fe)2SiO4
Identification
Color Every color except red (which is ruby)
Crystal habit massive and granular
Crystal system Hexagonal
Cleavage None
Fracture Conchoidal, splintery
Mohs Scale hardness 9.0
Luster Vitreous
Refractive index 1.762-1.778
Optical Properties Abbe number 72.2
Birefringence 0.008
Pleochroism Strong
Streak White
Specific gravity 3.95-4.03
Melting point 2030 - 2050 °C
Fusibility infusible
Solubility insoluble
Other Characteristics Coefficient of thermal expansion 5e-6–6.6e-6/K