• Hardness

  8.0.

• Occurrence

  Brazil, U.S., Sri Lanka (Ceylon), Myanmar (Burma), former USSR, Australia, Pakistan, Mexico, Tasmania, Japan, Africa. Topaz and citrine are the birthstones of the month of November. Some blue topaz are indistinguishable from aquamarine with the naked eye. Most blue topaz is irradiated and heat treated silver topaz, although it is sometimes found naturally. The names "Sky blue", "Swiss blue", "London blue" are trade names which refer to the darkness of the gemstone, with "sky blue" being the lightest and "London blue" being the darkest.

• Appearance

  Sky blue topaz is the lightest shade of the blue topaz, and is often mistaken for aquamarine.

• Enhancements

  Blue topaz is usually irradiated and often heated to produce blue color.

  More information on gemstone enhancements.

• Sky Blue Topaz

  • Item #TPZ366
    	1.23 ct. total
    	5.0mm Round Cut
    	Medium Light
    	Strong Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	only one pair available
    Sky Blue Topaz	$ 29.99/pair

  • Item #TPZ379
    	2.50 ct.
    	8.0mm Round Brilliant Cut
    	Medium Light
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Sky Blue Topaz	$ 14.99

  • Item #TPZ324
    	4.48 ct.
    	11.1x9.0mm Oval Cut
    	Medium Light
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Sky Blue Topaz	$ 29.99

  • Item #TPZ311
    	1.79 ct. total
    	6.0mm Heart Shape
    	Medium Light
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 45 pairs
    Sky Blue Topaz	$ 34.99/pair

• Calibrated Sky Blue Topaz

  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, bright light blue, good cut, good polish..

  Sky Blue Topaz		Quality	AA
  Shape	Size	Avg. Weight	Price Each
  Round	2.5mm	0.08	$ 2
  	3mm	0.14	$ 4
  	3.5mm	0.22	$ 4
  	4mm	0.30	$ 4
  	4.5mm	0.42	$ 4
  	5mm	0.56	$ 5
  	6mm	0.98	$ 6
  	7mm	1.57	$ 7
  	8mm	2.22	$ 11
  	9mm	3.29	$ 14
  Oval	5x3mm	0.25	$ 4
  	6x4mm	0.50	$ 4
  	7x5mm	0.99	$ 7
  	8x6mm	1.57	$ 10
  	9x7mm	2.47	$ 12
  	10x8mm	3.11	$ 18
  	11x9mm	4.20	$ 20
  Pear	5x3mm	0.20	$ 4
  	6x4mm	0.46	$ 4
  	7x5mm	0.75	$ 6
  	8x5mm	1.00	$ 7
  	8x6mm	1.33	$ 8
  	9x6mm	1.50	$ 10
  	10x7mm	2.01	$ 11
  	12x8mm	3.05	$ 16
  	14x9mm	4.37	$ 24
  	15x10mm	6.51	$ 28
  Marquise	4x2mm	0.09	$ 4
  	5x2.5mm	0.16	$ 4
  	6x3mm	0.25	$ 4
  	8x4mm	0.50	$ 5
  	10x5mm	1.00	$ 6
  	12x6mm	1.98	$ 10
  	14x7mm	3.11	$ 14
  	15x7mm	3.48	$ 16
  Emerald	5x3mm	0.25	$ 4
  	6x4mm	0.53	$ 5
  	7x5mm	0.99	$ 6
  	8x6mm	1.57	$ 10
  	9x7mm	2.47	$ 13
  	10x8mm	3.01	$ 18
  	11x9mm	4.01	$ 24
  	12x10mm	5.01	$ 32
  	14x10mm	9.53	$ 36
  	14x12mm	12.82	$ 50
  Square	4mm	0.37	$ 4
  	5mm	0.72	$ 6
  Heart	4mm	0.27	$ 3
  	5mm	0.50	$ 4
  	6mm	0.80	$ 5
  	7mm	1.38	$ 8
  	8mm	2.05	$ 10
  	9mm	2.99	$ 14
  	10mm	4.00	$ 20

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Last updated February 9, 2010
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