Spinel Facts

Spinel Facts

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Spinel  Properties

Chemical Composition It is Magnesium Aluminum Oxide having the chemical formula MgAl2O4.
Colours Red, blue, green, orange, mauve, violet, yellow, purple, brown and black.
Streak White or grayish white.
Refractive Index 1.71 – 1.76 (approx)
Specific Gravity 3.58-3.73
Luster Vitreous.
Solid State Transparent to translucent and sometimes nearly opaque.
Crystal System Isometric – Cubic Hexagonal crystal system.
Hardness 8 Mohs.
Clevage None
Fractures Uneven to conchoidal.
Bi-refringence None
Luminescence Sometimes fluorescent.
Tenacity Brittle
Synthetic Availability Synthetic stones are available.
Enhancement Not enhanced.
Source Myanmar (Burma), Afghanistan, Madagascar, Pakistan, Australia, Italy, Sri Lanka (Ceylon), Brazil, Tanzania, Sweden, Turkey, Russia and United States.
Precautions Only general gemstone precautions required.