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ID: 3297894 pcs
thumb image of 2.7ct Oval Cabochon Multicolor Black Opal (ID: 329789)
2.69ct Black Opal
6.98 x 5.04 x 3.64mm
USD 107.60
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ID: 3243981 pcs
thumb image of 2.4ct Pear Cabochon Multicolor Black Opal (ID: 324398)
2.38ct Black Opal
12.77 x 8.93 x 4.78mm
USD 95.20
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ID: 3297995 pcs
thumb image of 2.7ct Oval Cabochon Multicolor Black Opal (ID: 329799)
2.67ct Black Opal
6.98 x 4.95 x 3.19mm
USD 106.80
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ID: 3238641 pcs
thumb image of 5.2ct Pear Cabochon Multicolor Black Opal (ID: 323864)
5.21ct Black Opal
16.03 x 10.89 x 6.93mm
USD 208.40
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ID: 3297985 pcs
thumb image of 2.4ct Oval Cabochon Multicolor Black Opal (ID: 329798)
2.36ct Black Opal
6.95 x 5.01 x 2.80mm
USD 94.40
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ID: 3297975 pcs
thumb image of 3.1ct Oval Cabochon Multicolor Black Opal (ID: 329797)
3.11ct Black Opal
6.95 x 5.04 x 3.58mm
USD 124.40
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ID: 3244031 pcs
thumb image of 3ct Pear Cabochon Multicolor Black Opal (ID: 324403)
2.96ct Black Opal
13.19 x 10.24 x 5.36mm
USD 118.40
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ID: 3302501 pcs
thumb image of 7.4ct Pear Cabochon Multicolor Black Opal (ID: 330250)
7.39ct Black Opal
15.56 x 11.40 x 8.76mm
USD 295.60
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ID: 3193871 pcs
thumb image of 5.1ct Oval Cabochon Multicolor Black Opal (ID: 319387)
5.05ct Black Opal
15.99 x 10.67 x 6.30mm
USD 202.00
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ID: 3243991 pcs
thumb image of 2.9ct Pear Cabochon Multicolor Black Opal (ID: 324399)
2.90ct Black Opal
12.48 x 8.86 x 6.22mm
USD 116.00
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ID: 3294964 pcs
thumb image of 1.7ct Oval Cabochon Multicolor Black Opal (ID: 329496)
1.74ct Black Opal
5.94 x 4.02 x 3.50mm
USD 69.60
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ID: 3291354 pcs
thumb image of 4ct Oval Cabochon Multicolor Black Opal (ID: 329135)
4.01ct Black Opal
8.07 x 6.08 x 4.28mm
USD 160.40
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ID: 3291364 pcs
thumb image of 4.3ct Oval Cabochon Multicolor Black Opal (ID: 329136)
4.29ct Black Opal
8.16 x 6.17 x 4.39mm
USD 171.60
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ID: 3298045 pcs
thumb image of 2.7ct Oval Cabochon Multicolor Black Opal (ID: 329804)
2.65ct Black Opal
6.98 x 5.00 x 3.16mm
USD 106.00
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ID: 3302451 pcs
thumb image of 6.7ct Oval Cabochon Multicolor Black Opal (ID: 330245)
6.74ct Black Opal
14.72 x 11.91 x 8.13mm
USD 269.60
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ID: 3302911 pcs
thumb image of 4.1ct Pear Cabochon Multicolor Black Opal (ID: 330291)
4.11ct Black Opal
16.69 x 10.84 x 5.27mm
USD 164.40
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ID: 3297864 pcs
thumb image of 2.5ct Oval Cabochon Multicolor Black Opal (ID: 329786)
2.47ct Black Opal
7.01 x 5.03 x 3.62mm
USD 98.80
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ID: 3294924 pcs
thumb image of 1.7ct Oval Cabochon Multicolor Black Opal (ID: 329492)
1.74ct Black Opal
5.94 x 4.04 x 3.49mm
USD 69.60
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ID: 3291314 pcs
thumb image of 2.8ct Oval Cabochon Multicolor Black Opal (ID: 329131)
2.79ct Black Opal
7.00 x 5.04 x 3.76mm
USD 111.60
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ID: 3238631 pcs
thumb image of 2.2ct Pear Cabochon Multicolor Black Opal (ID: 323863)
2.19ct Black Opal
15.00 x 7.57 x 4.53mm
USD 87.60
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ID: 3529671 pcs
thumb image of 2.6ct Pear Cabochon Multicolor Black Opal (ID: 352967)
2.64ct Black Opal
13.02 x 8.44 x 5.15mm
USD 105.60
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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

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

Note: 1ct = 0.2g

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