Green Sapphire (Corundum)

Green sapphire was known as ‘oriental peridot’ from medieval times to the end of the 19^th century. Many sapphires that appear green actually consist of very fine alternative bands of blue and yellow sapphire. That may be visible under a microsope.

Occurrence

A green sapphire occurs in Sri Lanka, Thailand, and Australia (New South Wales and Queensland).

Green Sapphire Properties

• Specific Gravity: 4.00
• Refractive Index: 1.76-1.77
• Birefringence (DR): 0.008
• Luster: Vitreous
• Crystal Structure: Trigonal
• Composition: Aluminum Oxide
• Hardness: 9

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Birthstone

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