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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (203): Australian Opal Gems Opal, Opal Doublet, Boulder Opal, Black Opal Clear All
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ID: 4468033 pcs
thumb image of 2ct Pear Cabochon Multicolor Opal Doublet (ID: 446803)
2.03 ct Opal Doublet
8.2 x 5.1 mm
$ 30.45
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ID: 2496675 pcs
thumb image of 3.6ct Oval Cabochon Blue Opal Doublet (ID: 249667)
3.60 ct Opal Doublet
7.9 x 6 mm
$ 16.20
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ID: 4469342 pcs
thumb image of 15.7ct Fancy Cabochon Blue Opal Doublet (ID: 446934)
15.67 ct Opal Doublet
26.1 x 11 mm
$ 235.05
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ID: 4492091 pcs
thumb image of 0.9ct Marquise Cabochon Multicolor Opal Doublet (ID: 449209)
0.89 ct Opal Doublet
10.2 x 5.1 mm
$ 12.99
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ID: 3652231 pcs
thumb image of 13.5ct Fancy Cabochon Multicolor Boulder Opal (ID: 365223)
13.52 ct Boulder Opal
26.5 x 11.8 mm
$ 94.64
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ID: 3108151 pcs
thumb image of 16.3ct Oval Cabochon Multicolor Boulder Opal (ID: 310815)
16.32 ct Boulder Opal
18.7 x 14.7 mm
$ 114.24
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ID: 4206711 pcs
thumb image of 15.6ct Oval Cabochon Multicolor Boulder Opal (ID: 420671)
15.56 ct Boulder Opal
19.3 x 14.3 mm
$ 93.36
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ID: 4495261 pcs
thumb image of 16.8ct Oval Cabochon Multicolor Boulder Opal (ID: 449526)
16.77 ct Boulder Opal
27.1 x 16 mm
$ 117.39
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ID: 4206741 pcs
thumb image of 15.5ct Fancy Cabochon Multicolor Boulder Opal (ID: 420674)
15.53 ct Boulder Opal
18.3 x 13.8 mm
$ 93.18
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ID: 3028991 pcs
thumb image of 17.3ct Pear Cabochon Multicolor Boulder Opal (ID: 302899)
17.27 ct Boulder Opal
23.5 x 13.5 mm
$ 120.89
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ID: 3652301 pcs
thumb image of 17.6ct Fancy Cabochon Multicolor Boulder Opal (ID: 365230)
17.55 ct Boulder Opal
19.4 x 13.3 mm
$ 122.85
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ID: 4207791 pcs
thumb image of 14.7ct Fancy Cabochon Multicolor Boulder Opal (ID: 420779)
14.72 ct Boulder Opal
22.9 x 11.6 mm
$ 88.32
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ID: 4206821 pcs
thumb image of 22.7ct Fancy Cabochon Multicolor Boulder Opal (ID: 420682)
22.65 ct Boulder Opal
29.3 x 12.9 mm
$ 135.90
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ID: 3218361 pcs
thumb image of 13.4ct Pear Cabochon Multicolor Boulder Opal (ID: 321836)
13.35 ct Boulder Opal
21.4 x 15 mm
$ 93.45
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ID: 3218381 pcs
thumb image of 20.9ct Pear Cabochon Multicolor Boulder Opal (ID: 321838)
20.90 ct Boulder Opal
23.5 x 19.6 mm
$ 146.30
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ID: 3004561 pcs
thumb image of 20.7ct Pear Cabochon Multicolor Boulder Opal (ID: 300456)
20.74 ct Boulder Opal
23.1 x 15 mm
$ 145.18
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ID: 4207441 pcs
thumb image of 12.9ct Oval Cabochon Multicolor Boulder Opal (ID: 420744)
12.87 ct Boulder Opal
21 x 10 mm
$ 77.22
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ID: 3219201 pcs
thumb image of 21ct Oval Cabochon Multicolor Boulder Opal (ID: 321920)
21.04 ct Boulder Opal
27.9 x 12.8 mm
$ 147.28
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ID: 3227301 pcs
thumb image of 11.9ct Round Cabochon Multicolor Boulder Opal (ID: 322730)
11.89 ct Boulder Opal
14.9 mm
$ 83.23
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ID: 2480001 pcs
thumb image of 13.1ct Oval Cabochon Multicolor Boulder Opal (ID: 248000)
13.14 ct Boulder Opal
19.5 x 13.5 mm
$ 91.98
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ID: 4207821 pcs
thumb image of 12.4ct Fancy Cabochon Multicolor Boulder Opal (ID: 420782)
12.42 ct Boulder Opal
18.1 x 13.1 mm
$ 74.52
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Australian Opal Gems
Australia is the most important source for fine opal gemstones. Australian opals include black opal, boulder opal, crystal opal, fire opal and white opal. Famous opal deposits in New South Wales are at Lightning Ridge and White Cliffs, in South Australia, and also at Coober Pedy and Andamooka. Other opal deposits are also found in Queensland. Australia is the main source of the world's finest and largest supply of precious opal, including the rarest and most valuable Australian black opal. The best black opal is thought to come from Lightning Ridge in New South Wales. Australian opal is known for its incredible play of color and excellent stability. Opal gemstones make wonderfully unique and interesting jewelry. In 1993, Australia declared opal its national gemstone. Some of the finest and largest Australian opals ever seen include the multicolored precious opal gem called the Virgin Rainbow, from Coober Pedy, Big Ben, which was found in Lightning Ridge, the Light of the World and the Andamooka Desert Flame.
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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