• 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.

• Appearance

  London blue topaz is generally the darkest shade of the blue topaz, and are very striking gemstones. Most blue topaz is irradiated and heat treated silver topaz, although it is sometimes found naturally.

• Enhancements

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

  More information on gemstone enhancements.

• London Blue Topaz

  • Item #TPZ680
    	3.71 ct.
    	9.0mm Round Cut
    	Medium Dark
    	Strong Blue Green
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 4
    London Blue Topaz	$ 104.99

  • Item #TPZ471
    	2.38 ct. total
    	6.0mm Square Cut
    	Medium
    	Strong Very Strongly Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 2 pairs
    London Blue Topaz	$ 264.99/pair

  • Item #TPZ470
    	0.94 ct.
    	6.0mm Heart Shape
    	Medium Dark
    	Strong Very Strongly Greenish Blue
    	Loupe Clean
    	[R] Neutron irradiated and/or heat treated.
    	Quantity Available: 3
    London Blue Topaz	$ 89.99

• Calibrated London 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, medium dark, fine brilliance, good cut..

  London Blue Topaz		Quality	AA
  Shape	Size	Avg. Weight	Price Each
  Round	2.5mm	0.08	$ 9
  	3mm	0.14	$ 9
  	4.5mm	0.42	$ 16
  	5mm	0.56	$ 17
  	6mm	0.98	$ 18
  	7mm	1.57	$ 43
  	10mm	4.64	$ 84
  Oval	5x3mm	0.25	$ 13
  	6x4mm	0.50	$ 16
  	7x5mm	0.99	$ 23
  	9x7mm	2.47	$ 60
  	10x8mm	3.11	$ 80
  	11x9mm	4.20	$ 102
  	12x10mm	5.29	$ 132
  	14x10mm	7.17	$ 155
  	14x12mm	9.53	$ 206
  Pear	6x4mm	0.46	$ 14
  	7x5mm	0.75	$ 22
  	8x5mm	1.00	$ 25
  	9x6mm	1.50	$ 33
  	10x7mm	2.01	$ 54
  	12x8mm	3.05	$ 80
  	14x9mm	4.37	$ 114
  	15x10mm	6.51	$ 148
  Marquise	6x3mm	0.25	$ 14
  	8x4mm	0.50	$ 23
  	10x5mm	1.00	$ 34
  	12x6mm	1.98	$ 54
  Emerald	5x3mm	0.25	$ 14
  	6x4mm	0.53	$ 28
  	7x5mm	0.99	$ 35
  	8x6mm	1.57	$ 46
  	9x7mm	2.47	$ 86
  	10x8mm	3.01	$ 94
  	11x9mm	4.01	$ 107
  	12x10mm	5.01	$ 153
  	14x10mm	9.53	$ 178
  Square	2.5mm	0.12	$ 12
  	3mm	0.21	$ 12
  	4.5mm	0.54	$ 20
  	5mm	0.72	$ 22
  	6mm	1.27	$ 39
  Heart	4mm	0.27	$ 16
  	5mm	0.50	$ 19
  	6mm	0.80	$ 27
  	7mm	1.38	$ 38
  Trillion	4mm	0.19	$ 12
  	5mm	0.33	$ 20
  	6mm	0.51	$ 24
  	7mm	1.50	$ 35
  Straight Baguette	4x2mm	0.20	$ 17
  	5x2.5mm	~	$ 19
  	6x3mm	~	$ 20
  Tapered Baguette	4x2x1.5mm	~	$ 17
  Princess	3mm	0.16	$ 12
  	3.5mm	0.26	$ 12
  	4mm	0.37	$ 20
  	4.5mm	0.53	$ 24
  	5mm	0.71	$ 26
  	5.5mm	0.95	$ 34
  	6mm	1.17	$ 39
  	6.5mm	1.59	$ 47
  Cabochon, Round	4mm	0.64	$ 12
  	5mm	0.66	$ 22
  Cabochon, Oval	5x3mm	0.32	$ 16
  	6x4mm	0.60	$ 19
  	7x5mm	1.10	$ 24
  	8x6mm	1.66	$ 35
  	9x7mm	2.53	$ 56
  	10x8mm	3.55	$ 80
  Cabochon, Pear	5x3mm	0.23	$ 14
  	6x4mm	0.33	$ 18
  	7x5mm	0.87	$ 22
  	8x5mm	0.97	$ 27
  	8x6mm	1.43	$ 32
  	9x6mm	1.54	$ 39
  	10x7mm	2.79	$ 54
  Antique	5mm	~	$ 24
  	6mm	~	$ 48
  Antique Cushion	8x6mm	1.83	$ 44
  	9x7mm	2.64	$ 68
  Round, Checkerboard Top	7mm	~	$ 33
  	8mm	~	$ 46

Next Page

Last updated May 19, 2008
Copyright © 1995-2008 Gem Hut™. All rights reserved.