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ID: 3302461 pcs
thumb image of 6.9ct Pear Cabochon Multicolor Black Opal (ID: 330246)
6.92 ct Black Opal
18.5 x 13.3 mm
$ 207.60
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ID: 4719861 pcs
thumb image of 2.6ct Oval Cabochon Multicolor Black Opal (ID: 471986)
2.59 ct Black Opal
11.1 x 8.9 mm
$ 64.75
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ID: 4731142 pcs
thumb image of 2.3ct Oval Cabochon Multicolor Black Opal (ID: 473114)
2.34 ct Black Opal
9.1 x 7.2 mm
$ 48.98
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ID: 3298154 pcs
thumb image of 5.7ct Oval Cabochon Multicolor Black Opal (ID: 329815)
5.72 ct Black Opal
9.1 x 7.1 mm
$ 171.60
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ID: 4738531 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473853)
1.41 ct Black Opal
9.1 x 7.2 mm
$ 29.51
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ID: 4733732 pcs
thumb image of 3ct Oval Cabochon Multicolor Black Opal (ID: 473373)
3.03 ct Black Opal
9.2 x 7.2 mm
$ 63.42
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ID: 4736831 pcs
thumb image of 2.3ct Oval Cabochon Multicolor Black Opal (ID: 473683)
2.34 ct Black Opal
10 x 8.2 mm
$ 48.98
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ID: 4739363 pcs
thumb image of 2.2ct Oval Cabochon Multicolor Black Opal (ID: 473936)
2.24 ct Black Opal
8 x 6 mm
$ 46.88
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ID: 4720251 pcs
thumb image of 2ct Oval Cabochon Multicolor Black Opal (ID: 472025)
1.96 ct Black Opal
11.8 x 8.1 mm
$ 49.00
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ID: 4734391 pcs
thumb image of 1.7ct Oval Cabochon Multicolor Black Opal (ID: 473439)
1.65 ct Black Opal
9.2 x 7.2 mm
$ 34.53
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ID: 4719401 pcs
thumb image of 3.4ct Oval Cabochon Multicolor Black Opal (ID: 471940)
3.36 ct Black Opal
13.8 x 10.2 mm
$ 84.00
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ID: 4718221 pcs
thumb image of 2.5ct Oval Cabochon Multicolor Black Opal (ID: 471822)
2.50 ct Black Opal
13.5 x 8.1 mm
$ 62.50
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ID: 4733762 pcs
thumb image of 2.4ct Oval Cabochon Multicolor Black Opal (ID: 473376)
2.35 ct Black Opal
9.1 x 7.1 mm
$ 49.19
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ID: 4732674 pcs
thumb image of 6.4ct Round Cabochon Multicolor Black Opal (ID: 473267)
6.38 ct Black Opal
8.2 mm
$ 133.53
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ID: 4737831 pcs
thumb image of 5.7ct Oval Cabochon Multicolor Black Opal (ID: 473783)
5.67 ct Black Opal
13.7 x 11.3 mm
$ 118.67
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ID: 4719381 pcs
thumb image of 2.4ct Oval Cabochon Multicolor Black Opal (ID: 471938)
2.43 ct Black Opal
12.5 x 8.8 mm
$ 60.75
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ID: 4649344 pcs
thumb image of 1.7ct Round Cabochon Multicolor Black Opal (ID: 464934)
1.65 ct Black Opal
5.1 mm
$ 49.50
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ID: 4718231 pcs
thumb image of 5.7ct Oval Cabochon Multicolor Black Opal (ID: 471823)
5.66 ct Black Opal
14.3 x 10.3 mm
$ 141.50
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ID: 4734911 pcs
thumb image of 1.6ct Oval Cabochon Multicolor Black Opal (ID: 473491)
1.60 ct Black Opal
9.9 x 7.9 mm
$ 33.49
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ID: 4731192 pcs
thumb image of 2.9ct Oval Cabochon Multicolor Black Opal (ID: 473119)
2.90 ct Black Opal
9.2 x 7 mm
$ 60.70
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ID: 4731202 pcs
thumb image of 2.4ct Oval Cabochon Multicolor Black Opal (ID: 473120)
2.38 ct Black Opal
9.2 x 7.2 mm
$ 49.81
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Black Opal

Black opal is considered the most valuable of opal varieties. Black opal contains traces of iron oxide and carbon elements not found in other common opals. These combined elements give black opal the unique color properties it is famed for. Black opal is mainly found in Lightning Ridge of NSW, Australia. In 2008, New South Wales declared Black opal as its Official State Gemstone.

Ethiopia is also known to produce treated black opal. The Ethiopian black opal is treated with a smoking process that darkens the color of the opal. The treatment enhances the play of color, rivaling some of Lightning Ridge's opals. The treated Ethiopian black opal is a great value gem because it sells for much less than Australian black opal.

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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

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