• Hardness

  7.0.

• Occurrence

  Madagascar, North America, Brazil, Myanmar (Burma), Africa, Siberia, Australia, Sri Lanka (Ceylon). Tourmaline and opal are the birthstones of the month of October. Tourmaline is the national gemstone of the United States.

• Appearance

  Dark blue tourmaline is called indicolite, or indigolite. These are some of the most beautiful and sought after tourmalines.

• Enhancements

  Green and Blue tourmaline is commonly heat treated to improve color.

  More information on gemstone enhancements.

• Indicolite

  • Item #TRM363
    	0.13 ct. total
    	2.5mm Round Cut
    	Medium Light
    	Strong Green Blue
    	Very Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 4 pairs
    Indicolite Tourmaline	$ 359.99/pair

  • Item #TRM260
    	2.04 ct.
    	8.7x6.8mm Emerald Cut
    	Medium Dark
    	Vivid Green Blue
    	Slightly Included
    	[H] Heated to improve color.
    	one of a kind
    Indicolite Tourmaline	$ 604.99

  • Item #TRM353
    	2.34 ct.
    	10.0x5.4mm Emerald Cut
    	Medium Dark
    	Vivid Green Blue
    	Slightly Included
    	[N] Not enhanced.
    	one of a kind
    Neon Blue Indicolite Tourmaline	$ 1,304.99

  • Item #TRM545
    	9.90 ct.
    	13.5x11.6mm Cabochon, Oval Cut
    	Medium Dark
    	Moderately Strong Green Blue
    	Slightly Included
    	[E] Routinely enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 489.99

  • Item #TRM564
    	0.24 ct.
    	5.0x3.2mm Cabochon, Oval Cut
    	Medium Light
    	Vivid Bluish Violet
    	Slightly Included
    	[H] Heated to improve color.
    	one of a kind
    Blue-Violet Indicolite Tourmaline	$ 24.99

  • Item #TRM274
    	9.37 ct.
    	17.9x7.9mm Fancy Cut
    	Medium Dark
    	Vivid Green Blue
    	Slightly Included
    	[H] Heated to improve color.
    	one of a kind
    Indicolite Tourmaline	$ 464.99

  • Item #TRM391
    	11.04 ct.
    	13.2x10.4mm Rectangle Cut
    	Medium Dark
    	Strong Green Blue
    	Moderately Included
    	[H] Heated to improve color.
    	one of a kind
    Indicolite Tourmaline	$ 544.99

  • Item #TRM418
    	0.40 ct.
    	4.6mm Round, Checkerboard Top Cut
    	Medium Dark
    	Strong Very Slightly Bluish Green
    	Moderately Included
    	[N] Not enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 39.99

  • Item #TRM504
    	2.25 ct.
    	9.6x6.8mm Emerald, Millenium Cut
    	Medium Light
    	Vivid Green Blue
    	Slightly Included
    	[A] Not normally enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 249.99

  • Item #TRM505
    	6.26 ct.
    	16.4x7.8mm Emerald, Millenium Cut
    	Medium
    	Vivid Green Blue
    	Slightly Included
    	[A] Not normally enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 694.99

  • Item #TRM506
    	7.80 ct.
    	23.6x6.8mm Emerald, Millenium Cut
    	Medium
    	Vivid Green Blue
    	Slightly Included
    	[A] Not normally enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 869.99

  • Item #TRM507
    	11.59 ct.
    	24.6x8.5mm Emerald, Millenium Cut
    	Medium
    	Vivid Green Blue
    	Slightly Included
    	[A] Not normally enhanced.
    	one of a kind
    Indicolite Tourmaline	$ 1,289.99

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Last updated June 22, 2009
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