• Hardness

  9.0.

• Occurrence

  Myanmar (Burma), Thailand, India, Sri Lanka (Ceylon), Tanzania, Afghanistan, Australia, Brazil, Cambodia, Malagasy Republic, Malawi, Pakistan, Zimbabwe (Rhodesia), United States (Montana, North Carolina).

• Appearance

  Black sapphires are found in the form of star sapphires. These dark six-rayed stars are very attractive. These can be confused with star diopside which only have a four-rayed star.

• Enhancements

  Black star sapphire is always heat treated to produce, intensify or lighten color and/or improve color uniformity and appearance.

  More information on gemstone enhancements.

• Black Star Sapphire

  • Item #SPH587
    	1.92 ct.
    	10.0x8.0mm Cabochon, Oval Cut
    	Black
    	Opaque
    	[H] Heated to improve color.
    	one of a kind
    Black Star Sapphire	$ 149.99

  • Item #SPH646
    	8.11 ct.
    	11.7x10.0mm Cabochon, Oval Cut
    	Black
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    with an excellent six rayed star
    Black Star Sapphire	$ 249.99

  • Item #SPH650
    	12.50 ct.
    	12.8x11.1mm Cabochon, Oval Cut
    	Black
    	Opaque
    	[N] Not enhanced.
    	one of a kind
    with an excellent six rayed star
    Black Star Sapphire	$ 384.99

• Calibrated Black Star Sapphire

  Specify size, shape and quality when ordering. Prices are subject to change without notice. Actual carat weight may vary from the average carat weight listed.

  • AA Black, medium dome, excellent star, good polish, good cut.

  Black Star Sapphire		Quality	AA
  Shape	Size	Avg. Weight	Price Each
  Marquise	6x3mm	0.28	$ 13
  	8x4mm	0.57	$ 31
  	10x5mm	1.14	$ 68
  Cabochon, Round	4mm	0.85	$ 9
  	5mm	0.78	$ 16
  	6mm	1.47	$ 36
  	7mm	2.14	$ 69
  	8mm	3.11	$ 88
  Cabochon, Oval	5x3mm	0.38	$ 9
  	6x4mm	0.83	$ 19
  	7x5mm	1.34	$ 27
  	8x6mm	2.04	$ 61
  	9x7mm	2.95	$ 102
  	10x8mm	4.10	$ 189
  	11x9mm	5.49	$ 283
  	12x10mm	6.86	$ 422
  Cabochon, Marquise	6x3mm	0.38	$ 12
  	8x4mm	0.87	$ 30
  	10x5mm	1.54	$ 68

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Last updated June 22, 2009
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