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ID: 4206211 pcs
7.85ct Opal Doublet
21.70 x 14.19 x 2.91mm
USD 125.60
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ID: 3625374 pcs
1.99ctw Opal Doublet
7.28 x 5.04 x 1.81mm
USD 36.36
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ID: 3630421 pcs
1.41ct Opal Doublet
8.57 x 2.49mm
USD 26.21
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ID: 4206111 pcs
8.39ct Opal Doublet
21.52 x 15.45 x 2.60mm
USD 134.24
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ID: 3699594 pcs
3.77ctw Opal Doublet
8.23 x 6.11 x 2.40mm
USD 69.37
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ID: 39160420 pcs
7.43ctw Opal Doublet
6.18 x 4.09 x 1.75mm
USD 124.90
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ID: 3625174 pcs
2.33ctw Opal Doublet
8.03 x 5.02 x 1.68mm
USD 42.57
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ID: 35309916 pcs
11.59ctw Opal Doublet
8.06 x 6.05 x 1.69mm
USD 52.16
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ID: 3636684 pcs
1.96ctw Opal Doublet
6.91 x 4.92 x 1.77mm
USD 37.38
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ID: 4206141 pcs
7.46ct Opal Doublet
22.78 x 11.61 x 2.95mm
USD 119.36
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ID: 3156044 pcs
3.09ctw Opal Doublet
8.04 x 6.00 x 1.99mm
USD 77.25
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ID: 3811701 pcs
4.00ct Opal Doublet
19.52 x 8.91 x 2.82mm
USD 73.36
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ID: 4207101 pcs
3.60ct Opal Doublet
15.86 x 11.02 x 2.52mm
USD 57.60
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ID: 3913402 pcs
5.50ctw Opal Doublet
14.39 x 10.04 x 2.53mm
USD 92.46
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ID: 4206191 pcs
9.40ct Opal Doublet
26.24 x 13.28 x 2.82mm
USD 150.40
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ID: 39153720 pcs
6.46ctw Opal Doublet
6.05 x 4.26 x 1.99mm
USD 108.59
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ID: 3579091 pcs
37.15ct Opal Doublet
42.33 x 27.50 x 4.50mm
USD 241.48
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ID: 4287654 pcs
2.12ctw Opal Doublet
6.84 x 4.98 x 1.65mm
USD 49.14
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ID: 4207081 pcs
2.97ct Opal Doublet
16.92 x 9.16 x 2.50mm
USD 47.52
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ID: 3625734 pcs
2.24ctw Opal Doublet
7.92 x 5.03 x 1.91mm
USD 40.92
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ID: 3579701 pcs
3.88ct Opal Doublet
14.67 x 13.00 x 2.80mm
USD 25.22
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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

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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