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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (211): London Blue Topaz Gems Topaz Clear All
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ID: 3965781 pcs
thumb image of 29.9ct Square Facet London Blue Topaz (ID: 396578)
29.93 ct Topaz
16.1 x 16 mm
$ 524.07
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ID: 3969711 pcs
thumb image of 29.3ct Oval Facet London Blue Topaz (ID: 396971)
29.33 ct Topaz
21.2 x 15.8 mm
$ 513.57
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ID: 3965731 pcs
thumb image of 29.2ct Square Facet London Blue Topaz (ID: 396573)
29.20 ct Topaz
16.1 x 16 mm
$ 511.29
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ID: 3965741 pcs
thumb image of 26.6ct Square Facet London Blue Topaz (ID: 396574)
26.55 ct Topaz
16.1 x 16 mm
$ 464.89
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ID: 3969751 pcs
thumb image of 25.6ct Square Facet London Blue Topaz (ID: 396975)
25.63 ct Topaz
16.2 x 16.2 mm
$ 448.78
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ID: 3965701 pcs
thumb image of 24.9ct Square Facet London Blue Topaz (ID: 396570)
24.90 ct Topaz
15.9 x 15.5 mm
$ 436.00
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ID: 3965721 pcs
thumb image of 24.3ct Square Facet London Blue Topaz (ID: 396572)
24.33 ct Topaz
16.1 x 16.1 mm
$ 426.02
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ID: 3969761 pcs
thumb image of 24ct Square Facet London Blue Topaz (ID: 396976)
23.96 ct Topaz
16 x 15.9 mm
$ 419.54
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ID: 3965711 pcs
thumb image of 23.8ct Square Facet London Blue Topaz (ID: 396571)
23.83 ct Topaz
15.8 x 15.7 mm
$ 417.26
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ID: 4248821 pcs
thumb image of 33ct Oval Facet London Blue Topaz (ID: 424882)
33.00 ct Topaz
21.9 x 16 mm
$ 577.83
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ID: 4427211 pcs
thumb image of 1.5ct Pear Facet London Blue Topaz (ID: 442721)
1.47 ct Topaz
8.3 x 6 mm
$ 8.04
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ID: 4427121 pcs
thumb image of 1.3ct Pear Facet London Blue Topaz (ID: 442712)
1.28 ct Topaz
8.8 x 5.6 mm
$ 7.00
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ID: 4421952 pcs
thumb image of 2.9ct Pear Facet London Blue Topaz (ID: 442195)
2.88 ct Topaz
9.1 x 5.9 mm
$ 15.75
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ID: 4426931 pcs
thumb image of 1ct Pear Facet London Blue Topaz (ID: 442693)
0.97 ct Topaz
6.9 x 5.3 mm
$ 5.31
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ID: 4426961 pcs
thumb image of 1ct Pear Facet London Blue Topaz (ID: 442696)
1.00 ct Topaz
7.3 x 5.1 mm
$ 5.47
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ID: 4427511 pcs
thumb image of 1.3ct Pear Facet London Blue Topaz (ID: 442751)
1.33 ct Topaz
8.7 x 5.8 mm
$ 7.28
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ID: 4426711 pcs
thumb image of 1.4ct Pear Facet London Blue Topaz (ID: 442671)
1.42 ct Topaz
8.8 x 5.9 mm
$ 7.77
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ID: 4422951 pcs
thumb image of 1.4ct Pear Facet London Blue Topaz (ID: 442295)
1.44 ct Topaz
8.8 x 5.8 mm
$ 7.88
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ID: 3723965 pcs
thumb image of 6.8ct Octagon Facet London Blue Topaz (ID: 372396)
6.76 ct Topaz
6.1 x 6 mm
$ 47.32
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ID: 4426741 pcs
thumb image of 1.3ct Pear Facet London Blue Topaz (ID: 442674)
1.25 ct Topaz
8.7 x 5.7 mm
$ 6.84
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ID: 4421362 pcs
thumb image of 2.5ct Pear Facet London Blue Topaz (ID: 442136)
2.49 ct Topaz
9 x 5.9 mm
$ 13.62
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London Blue Topaz Gems
In general, blue topaz is one of the most popular and best value gemstones available today. Since natural blue topaz is extremely rare and often pale in color, the colors of London blue, Swiss blue, Electric blue and Sky blue topaz are formed through an artificial irradiation enhancement process. London blue topaz is considered 'natural topaz' although it has been treated, and through enhancement, it remains as one of the more affordable gemstones on the market, even in larger sizes; especially when compared to the prices of other popular blue gemstones, such as aquamarine, blue zircon and most especially, blue sapphire. It is in fact, the second most popular blue gemstone on the market, next to blue sapphire. Topaz is one of December's official birthstones. The topaz family of gemstone is indeed one of the most important gems in the world of colored stones. It is one of the hardest gems available (8 on Mohs scale), although its perfect cleavage can leave it vulnerable to hard knocks and blows, a trait it shares with diamond.

Blue topaz is available in a wide range of vivid blue hues, and not only does it occur with excellent transparency, it also exhibits a striking vitreous luster when cut and polished. Of all the many different colors of blue topaz, London blue is the most prized and usually the most valuable. However, since all blue topaz is relatively affordable, price differences between other color varieties are usually quite minimal. Blue topaz is traded under specific color varietal trade names such as Sky-blue, Swiss-blue and London-blue. London blue is the deepest of blue topaz colors and is described as being a medium to dark grayish-blue, sometimes referred to as 'inky' blue. London blue topaz gems will often have a slight secondary greenish tone when viewed from certain angles.

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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart