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ID: 20131916 pcs
thumb image of 12.7ct Oval Cabochon Multicolor Opal Doublet (ID: 201319)
12.71ct Opal Doublet
8.00 x 6.01 x 1.33mm
USD 57.20
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ID: 4207131 pcs
thumb image of 4.4ct Fancy Cabochon Multicolor Opal Doublet (ID: 420713)
4.43ct Opal Doublet
16.04 x 10.04 x 2.61mm
USD 70.88
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ID: 3579671 pcs
thumb image of 5.7ct Fancy Cabochon Multicolor Opal Doublet (ID: 357967)
5.73ct Opal Doublet
31.27 x 8.61 x 2.87mm
USD 37.25
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ID: 3625854 pcs
thumb image of 1.7ct Pear Cabochon Multicolor Opal Doublet (ID: 362585)
1.66ct Opal Doublet
6.89 x 4.82 x 1.58mm
USD 30.33
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ID: 4207171 pcs
thumb image of 3.3ct Oval Cabochon Multicolor Opal Doublet (ID: 420717)
3.26ct Opal Doublet
16.17 x 9.74 x 2.35mm
USD 52.16
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ID: 4206211 pcs
thumb image of 7.9ct Fancy Cabochon Multicolor Opal Doublet (ID: 420621)
7.85ct Opal Doublet
21.70 x 14.19 x 2.91mm
USD 125.60
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ID: 4206131 pcs
thumb image of 8.5ct Fancy Cabochon Multicolor Opal Doublet (ID: 420613)
8.47ct Opal Doublet
20.04 x 14.31 x 3.07mm
USD 135.52
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ID: 3579161 pcs
thumb image of 9.1ct Fancy Cabochon Multicolor Opal Doublet (ID: 357916)
9.11ct Opal Doublet
24.38 x 12.36 x 3.49mm
USD 59.22
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ID: 3577801 pcs
thumb image of 7.3ct Fancy Cabochon Multicolor Opal Doublet (ID: 357780)
7.28ct Opal Doublet
30.05 x 10.52 x 3.15mm
USD 47.32
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ID: 3636764 pcs
thumb image of 2ct Oval Cabochon Multicolor Opal Doublet (ID: 363676)
2.02ct Opal Doublet
7.02 x 5.07 x 1.88mm
USD 38.52
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ID: 4206111 pcs
thumb image of 8.4ct Fancy Cabochon Multicolor Opal Doublet (ID: 420611)
8.39ct Opal Doublet
21.52 x 15.45 x 2.60mm
USD 134.24
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Opal Doublet
More than any other gem, each opal is distinctly an individual. No other stone has as rich and varied a folklore. Opals are also the most delicate gems commonly worn. They require special care to insure their health and longevity.

Opal's fire was long thought to be the result of iridescence. However, with the advent of scanning electron microscopes, we now know that it is a result of diffraction.

Opal is relatively soft, with a rating of 5.5-6.5 on the Mohs Scale. Despite its frequent use in rings, opal is a poor choice for a ring stone; it is much better suited to earrings, pins, and pendants.

Major suppliers include Australia, Brazil, Mexico, and the US. Values are normally determined by the presence and nature of color flashes.

An opal doublet consists of a slice of opal glued to a black backing, designed to imitate the appearance of a solid black opal. Adhering the slice of opal to a black backing causes the colour to become much darker and more vibrant. Opal doublets are highly regarded as an inexpensive alternative to solid opals which are very expensive in larger sizes.
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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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