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ID: 4717691 pcs
thumb image of 11.7ct Oval Cabochon Multicolor Black Opal (ID: 471769)
11.70 ct Black Opal
18.4 x 14.2 mm
$ 292.50
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ID: 4736401 pcs
thumb image of 1.1ct Oval Cabochon Multicolor Black Opal (ID: 473640)
1.13 ct Black Opal
9 x 7.1 mm
$ 23.65
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ID: 4736321 pcs
thumb image of 1.1ct Oval Cabochon Multicolor Black Opal (ID: 473632)
1.14 ct Black Opal
9.9 x 7.9 mm
$ 23.86
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ID: 4717731 pcs
thumb image of 6.6ct Oval Cabochon Multicolor Black Opal (ID: 471773)
6.55 ct Black Opal
17.5 x 13.3 mm
$ 163.75
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ID: 4734431 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473443)
1.35 ct Black Opal
9.1 x 7 mm
$ 28.26
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ID: 4736301 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473630)
1.35 ct Black Opal
9.9 x 7.8 mm
$ 28.26
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ID: 4731511 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473151)
1.36 ct Black Opal
8.9 x 6.8 mm
$ 28.46
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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: 4736381 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473638)
1.36 ct Black Opal
9.2 x 7.3 mm
$ 28.46
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ID: 4718591 pcs
thumb image of 4.9ct Oval Cabochon Multicolor Black Opal (ID: 471859)
4.89 ct Black Opal
14.4 x 11.6 mm
$ 122.25
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ID: 4732604 pcs
thumb image of 5.8ct Oval Cabochon Multicolor Black Opal (ID: 473260)
5.81 ct Black Opal
9.1 x 7.1 mm
$ 121.60
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ID: 4731531 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473153)
1.41 ct Black Opal
8.8 x 6.9 mm
$ 29.51
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ID: 4718171 pcs
thumb image of 4.8ct Pear Cabochon Multicolor Black Opal (ID: 471817)
4.78 ct Black Opal
17.9 x 10.4 mm
$ 119.50
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ID: 4731571 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473157)
1.42 ct Black Opal
10.1 x 8 mm
$ 29.72
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ID: 4731152 pcs
thumb image of 2.6ct Oval Cabochon Multicolor Black Opal (ID: 473115)
2.60 ct Black Opal
9.1 x 7.2 mm
$ 54.42
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ID: 4731491 pcs
thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 473149)
1.43 ct Black Opal
9.1 x 6.8 mm
$ 29.93
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ID: 4718931 pcs
thumb image of 5.3ct Oval Cabochon Multicolor Black Opal (ID: 471893)
5.29 ct Black Opal
13.5 x 11.2 mm
$ 132.25
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ID: 4734381 pcs
thumb image of 1.5ct Oval Cabochon Multicolor Black Opal (ID: 473438)
1.48 ct Black Opal
9.1 x 7.1 mm
$ 30.98
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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: 4732654 pcs
thumb image of 5.5ct Oval Cabochon Multicolor Black Opal (ID: 473265)
5.54 ct Black Opal
9.1 x 7.2 mm
$ 115.95
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ID: 4736781 pcs
thumb image of 1.5ct Oval Cabochon Multicolor Black Opal (ID: 473678)
1.49 ct Black Opal
9.2 x 7.1 mm
$ 31.19
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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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