• 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

  Swiss blue topaz, also known as electric blue topaz, is the bright vivid form of blue topaz, darker than sky blue topaz, and not as dark as the london blue topaz.

• Enhancements

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

  More information on gemstone enhancements.

• Swiss Blue Topaz

  • Item #TPZ223
    	3.12 ct. total
    	8.0x6.0mm Oval Cut
    	Medium
    	Vivid Very Strongly Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 2 pairs
    Swiss Blue Topaz	$ 94.99/pair

  • Item #TPZ309
    	1.76 ct. total
    	7.0x5.0mm Oval Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 14 pairs
    Swiss Blue Topaz	$ 69.99/pair

  • Item #TPZ361
    	3.14 ct.
    	10.0x8.0mm Oval Cut
    	Medium Light
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 109.99/pair

  • Item #TPZ425
    	5.06 ct.
    	12.1x10.0mm Oval Cut
    	Medium
    	Vivid Green-Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 149.99

  • Item #TPZ468
    	2.74 ct. total
    	9.0x6.0mm Pear Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	only one pair available
    Swiss Blue Topaz	$ 129.99/pair

  • Item #TPZ364
    	1.96 ct.
    	8.0x6.0mm Emerald Cut
    	Medium Light
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 29.99/pair

  • Item #TPZ628
    	4.72 ct.
    	16.6x9.1mm Fancy Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 109.99

  • Item #TPZ670
    	6.62 ct.
    	12.8x9.9mm Fancy Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 89.99

  • Item #TPZ671
    	6.27 ct.
    	12.9x9.9mm Fancy Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 84.99

  • Item #TPZ672
    	9.46 ct.
    	14.1x11.7mm Fancy Cut
    	Medium
    	Vivid Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	one of a kind
    Swiss Blue Topaz	$ 129.99

• Calibrated Swiss 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 Medium to dark, cleanish, good cut, good polish, good brillliance.

  Swiss Blue Topaz		Quality	AA
  Shape	Size	Avg. Weight	Price Each
  Round	2mm	0.04	$ 5
  	2.25mm	0.06	$ 5
  	2.5mm	0.08	$ 5
  	2.75mm	0.11	$ 5
  	3mm	0.14	$ 6
  	3.25mm	0.17	$ 6
  	3.5mm	0.22	$ 6
  	4mm	0.30	$ 6
  	4.5mm	0.42	$ 6
  	5mm	0.56	$ 8
  	5.5mm	0.75	$ 10
  	6mm	0.98	$ 11
  	6.5mm	1.26	$ 14
  	7mm	1.57	$ 16
  	8mm	2.22	$ 23
  Oval	5x3mm	0.25	$ 6
  	6x4mm	0.50	$ 8
  	7x5mm	0.99	$ 12
  	8x6mm	1.57	$ 17
  	9x7mm	2.47	$ 25
  	10x8mm	3.11	$ 35
  	11x9mm	4.20	$ 45
  	12x10mm	5.29	$ 58
  	14x10mm	7.17	$ 68
  	14x12mm	9.53	$ 89
  Pear	5x3mm	0.20	$ 5
  	6x4mm	0.46	$ 7
  	7x5mm	0.75	$ 10
  	8x5mm	1.00	$ 12
  	8x6mm	1.33	$ 14
  	9x6mm	1.50	$ 17
  	10x7mm	2.01	$ 23
  	12x8mm	3.05	$ 35
  	14x9mm	4.37	$ 53
  	15x10mm	6.51	$ 62
  Marquise	4x2mm	0.09	$ 4
  	6x3mm	0.25	$ 6
  	8x4mm	0.50	$ 9
  	10x5mm	1.00	$ 14
  	12x6mm	1.98	$ 22
  	14x7mm	3.11	$ 34
  Emerald	5x3mm	0.25	$ 5
  	6x4mm	0.53	$ 9
  	7x5mm	0.99	$ 14
  	8x6mm	1.57	$ 20
  	9x7mm	2.47	$ 30
  	10x8mm	3.01	$ 39
  	11x9mm	4.01	$ 54
  	12x10mm	5.01	$ 68
  	14x10mm	9.53	$ 78
  	14x12mm	12.82	$ 95
  Square	3mm	0.21	$ 5
  	4mm	0.38	$ 8
  	4.5mm	0.55	$ 9
  	5mm	0.74	$ 11
  	6mm	1.27	$ 18
  	8mm	3.01	$ 38
  Heart	4mm	0.27	$ 6
  	5mm	0.50	$ 9
  	6mm	0.80	$ 11
  	7mm	1.38	$ 17
  	8mm	2.05	$ 22
  	9mm	2.99	$ 32
  	10mm	4.00	$ 46
  Trillion	4mm	0.19	$ 5
  	5mm	0.33	$ 9
  	6mm	0.51	$ 11
  	7mm	1.50	$ 16
  	8mm	2.01	$ 19
  	9mm	2.51	$ 33
  Straight Baguette	4x2mm	0.20	$ 6
  	5x2mm	~	$ 7
  	5x2.5mm	~	$ 8
  	6x3mm	~	$ 9
  	8x4mm	~	$ 14
  Tapered Baguette	4x2x1.5mm	~	$ 8
  Half Moon	10x7mm	~	$ 53
  Princess	3mm	0.16	$ 17
  	3.5mm	0.26	$ 18
  	4mm	0.37	$ 28
  	4.5mm	0.53	$ 32
  	5mm	0.70	$ 39
  	5.5mm	0.93	$ 49
  	6mm	1.17	$ 62
  	6.5mm	1.63	$ 74
  	8mm	3.12	$ 111
  Cabochon, Oval	5x3mm	0.32	$ 6
  	6x4mm	0.60	$ 9
  	7x5mm	1.10	$ 12
  	8x6mm	1.66	$ 16
  	9x7mm	2.53	$ 26
  	10x8mm	3.55	$ 37
  	14x10mm	7.29	$ 81
  Cabochon, Pear	6x4mm	0.33	$ 8
  	7x5mm	0.87	$ 12
  	9x6mm	1.54	$ 18
  	10x7mm	2.79	$ 25
  Cabochon, Square	7mm	~	$ 24
  	8mm	4.58	$ 26
  Antique	5mm	~	$ 11
  	6mm	~	$ 18
  Antique Cushion	8x6mm	~	$ 25
  	9x7mm	~	$ 33
  	10x8mm	~	$ 46
  Hexagon	8mm	~	$ 46
  	9mm	~	$ 67
  	10mm	~	$ 101
  	12mm	~	$ 152
  Roll Top	10x8mm	3.27	$ 91
  	14x10mm	7.28	$ 201

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Last updated May 18, 2010
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