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ID: 3577801 pcs
7.28ct Opal Doublet
30.05 x 10.52 x 3.15mm
USD 47.32
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ID: 4207161 pcs
3.66ct Opal Doublet
14.64 x 9.34 x 2.69mm
USD 58.56
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ID: 2940464 pcs
1.90ctw Opal Doublet
6.95 x 5.02 x 1.74mm
USD 57.00
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ID: 3630421 pcs
1.41ct Opal Doublet
8.57 x 2.49mm
USD 26.21
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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: 4206181 pcs
10.21ct Opal Doublet
24.99 x 14.11 x 3.15mm
USD 163.36
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ID: 4004014 pcs
1.85ctw Opal Doublet
7.07 x 4.88 x 1.82mm
USD 33.80
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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: 20132516 pcs
11.31ctw Opal Doublet
8.07 x 6.03 x 1.43mm
USD 50.90
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ID: 2940684 pcs
2.00ctw Opal Doublet
6.90 x 4.97 x 1.57mm
USD 60.00
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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: 3579151 pcs
11.42ct Opal Doublet
27.91 x 14.55 x 3.57mm
USD 74.23
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ID: 3915942 pcs
9.35ctw Opal Doublet
15.23 x 2.46mm
USD 207.10
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ID: 2940484 pcs
1.98ctw Opal Doublet
6.99 x 5.16 x 1.79mm
USD 59.40
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ID: 3915582 pcs
4.22ctw Opal Doublet
13.96 x 7.49 x 2.34mm
USD 70.94
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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: 3811711 pcs
3.16ct Opal Doublet
16.53 x 10.59 x 2.83mm
USD 57.95
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ID: 3913848 pcs
4.64ctw Opal Doublet
8.21 x 5.15 x 2.20mm
USD 78.00
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ID: 3623314 pcs
2.52ctw Opal Doublet
8.09 x 5.10 x 2.00mm
USD 46.04
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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: 3579131 pcs
8.91ct Opal Doublet
20.38 x 17.50 x 3.49mm
USD 57.92
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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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