• Hardness

  7.0 - 7.5.

• Occurrence

  Named after P. Cordier, a French geologist. Cordierite is also known as iolite and dichroite. Other common names are water sapphire and Vikings' compass, named so because of it's ability to determine the direction of the sun on overcast days. Cordierite is found in Germany, Brazil, Norway, Finland and Madagascar.

• Appearance

  Has strong pleochroism, meaning the gemstone changes colors depending which angle it is viewed from. Cordierite displays colors ranging from deep blue, to violet and light blue and grayish blue. It can be confused with tanzanite (zoisite) which is also strongly pleochroic.

• Enhancements

  Iolite is not enhanced.

  More information on gemstone enhancements.

• Cordierite (Water Sapphire)

  • Item #IOL149
    	0.12 ct. total
    	2.6mm Round Cut
    	Medium
    	Very Slightly Grayish Violetish Blue
    	Loupe Clean
    	[N] Not enhanced.
    	Quantity Available: 18 pairs
    Water Sapphire Iolite	$ 29.99/pair

  • Item #IOL197
    	0.32 ct. total
    	2.5mm Round Cut
    	Medium Light
    	Strong Violetish Blue
    	Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 2 sets
    Water Sapphire Iolite	$ 29.99/set of 52

  • Item #IOL198
    	1.04 ct. total
    	5.0mm Square Cut
    	Medium Light
    	Strong Violetish Blue
    	Loupe Clean
    	[N] Not enhanced.
    	Quantity Available: 9 pairs
    Water Sapphire Iolite	$ 39.99/pair

  • Item #IOL153
    	0.55 ct. total
    	4.0mm Cabochon, Round Cut
    	Dark
    	Very Slightly Grayish Violetish Blue
    	Very Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 21 pairs
    Water Sapphire Iolite	$ 39.99/pair

  • Item #IOL154
    	1.68 ct. total
    	6.0mm Cabochon, Round Cut
    	Dark
    	Strong Violetish Blue
    	Moderately Included
    	[N] Not enhanced.
    	Quantity Available: 3 pairs
    Water Sapphire Iolite	$ 34.99/pair

  • Item #IOL155
    	2.57 ct. total
    	7.0mm Cabochon, Round Cut
    	Dark
    	Very Slightly Grayish Violetish Blue
    	Very Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 3 pairs
    Water Sapphire Iolite	$ 54.99/pair

  • Item #IOL156
    	0.95 ct. total
    	6.0x4.0mm Cabochon, Oval Cut
    	Dark
    	Very Slightly Grayish Violetish Blue
    	Very Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 9 pairs
    Water Sapphire Iolite	$ 34.99/pair

  • Item #IOL157
    	1.61 ct. total
    	7.0x5.0mm Cabochon, Oval Cut
    	Dark
    	Very Slightly Grayish Violetish Blue
    	Very Slightly Included
    	[N] Not enhanced.
    	Quantity Available: 6 pairs
    Water Sapphire Iolite	$ 59.99/pair

• Calibrated Cordierite

  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 Eye clean, medium dark grayish purple, grape color, good cut..

  Cordierite		Quality	AA
  Shape	Size	Avg. Weight	Price Each
  Round Brilliant	2mm	0.02	$ 5
  	2.25mm	0.03	$ 5
  	2.5mm	0.04	$ 6
  	2.75mm	0.06	$ 7
  	3mm	0.07	$ 6
  	3.5mm	0.12	$ 6
  	4mm	0.18	$ 7
  	4.5mm	0.32	$ 10
  	5mm	0.40	$ 14
  	5.5mm	0.54	$ 32
  	6mm	0.67	$ 47
  Oval	4x3mm	0.14	$ 4
  	5x3mm	0.21	$ 5
  	5x4mm	0.28	$ 7
  	6x4mm	0.39	$ 10
  	7x5mm	0.63	$ 19
  	8x6mm	1.02	$ 54
  	12x10mm	4.22	$ 754
  Pear	5x3mm	0.18	$ 4
  	6x4mm	0.34	$ 9
  	7x5mm	0.57	$ 17
  	8x5mm	0.67	$ 30
  Marquise	4x2mm	0.06	$ 4
  	5x2.5mm	0.12	$ 5
  	6x3mm	0.21	$ 6
  	7x3.5mm	0.28	$ 11
  	8x4mm	0.47	$ 20
  Emerald	4x3mm	0.16	$ 4
  	4.25x3.25mm	0.17	$ 5
  	5x3mm	0.21	$ 6
  	5x4mm	0.33	$ 12
  	6x4mm	0.53	$ 19
  	6x5mm	0.61	$ 27
  	6.5x4.5mm	0.58	$ 26
  	7x5mm	0.90	$ 53
  	8x6mm	1.41	$ 101
  Square	2mm	0.05	$ 5
  	2.5mm	0.09	$ 6
  	3mm	0.15	$ 7
  	3.5mm	0.20	$ 8
  	4mm	0.31	$ 11
  	4.5mm	0.36	$ 15
  	5mm	0.59	$ 28
  	6mm	0.92	$ 70
  Heart	4mm	0.19	$ 5
  	5mm	0.38	$ 15
  Trillion	3mm	0.07	$ 7
  	3.5mm	0.10	$ 8
  	4mm	0.22	$ 7
  	4.5mm	0.24	$ 9
  	5mm	0.37	$ 14
  	5.5mm	0.42	$ 24
  	6mm	0.61	$ 36
  	6.5mm	0.67	$ 42
  Straight Baguette	4x2mm	0.15	$ 8
  	4.25x2.25mm	~	$ 8
  	5x2.5mm	~	$ 9
  	6x3mm	~	$ 17

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Last updated December 7, 2007
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