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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (11): Opal Doublet Clear All
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Multicolor Opal Doublet Gem - 4.7ct Oval Cabochon (ID: 503232)

Oval Multicolor Opal Doublet

4.7ct
25 x 7.2 mm
$ 125.38
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Multicolor Opal Doublet Gem - 1.9ct Oval Cabochon (ID: 503195)

Oval Multicolor Opal Doublet

1.9ct
13.1 x 8.2 mm
$ 50.63
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Multicolor Opal Doublet Gem - 1ct Oval Cabochon (ID: 510668)

Oval Multicolor Opal Doublet

1ct
8.1 x 6.1 mm
$ 24.54
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Multicolor Opal Doublet Gem - 1.1ct Oval Cabochon (ID: 510705)

Oval Multicolor Opal Doublet

1.1ct
8 x 6.1 mm
$ 27.29
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Multicolor Opal Doublet Gem - 0.6ct Oval Cabochon (ID: 510671)

Oval Multicolor Opal Doublet

0.6ct
7 x 5.1 mm
$ 15.52
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Multicolor Opal Doublet Gem - 0.7ct Oval Cabochon (ID: 510669)

Oval Multicolor Opal Doublet

0.7ct
7 x 5.1 mm
$ 16.28
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Multicolor Opal Doublet Gem - 0.8ct Oval Cabochon (ID: 510702)

Oval Multicolor Opal Doublet

0.8ct
8.2 x 6.2 mm
$ 20.78
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Multicolor Opal Doublet Gem - 0.8ct Oval Cabochon (ID: 510679)

Oval Multicolor Opal Doublet

0.8ct
8.1 x 6 mm
$ 18.78
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Multicolor Opal Doublet Gem - 1.1ct Oval Cabochon (ID: 510703)

Oval Multicolor Opal Doublet

1.1ct
8.1 x 6.2 mm
$ 26.29
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Multicolor Opal Doublet Gem - 0.9ct Oval Cabochon (ID: 510676)

Oval Multicolor Opal Doublet

0.9ct
8 x 6.1 mm
$ 23.54
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Multicolor Opal Doublet Gem - 2.5ct Oval Cabochon (ID: 510680)

Oval Multicolor Opal Doublet

2.5ct
12.8 x 9.5 mm
$ 62.85
Item in Stock
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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I was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.
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Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
Posted By Dirk in January, 2019
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Posted By BO in January, 2019
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Overall Rating -> 10 star ratings
As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
Posted By Brian in January, 2019
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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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