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Jewelry  Double refraction  Draw color

An example of a doublet. This could be a natural, undesirable color sapphire crown on a deep blue synthetic sapphire pavilion. Due to refraction of light this stone would appear blue all over when viewed in person.

Composite stone made of two pieces cemented or glued together.
Jewelry Frequently Asked Questions
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Opal doublets and triplets are thin slices of opal which are bonded to a matrix and sometimes covered with a quartz top (triplets).
Opal is rarely impregnated with colorless oil, wax and resins. Triplets are covered with colorless quartz.

This is technically a doublet ... a thin layer of natural, precious Lightning Ridge opal on
an ironstone base. This opal is found in seams running through the host rock, and sometimes
the opal seams are a bit too thin to cut solid stones. One side is ground off and polished, ...

Doublets and Triplets
Most gem lovers are familiar with doublets and triplets, especially the opal variety. Opal frequently occurs as thin seams of material within a host or matrix rock. Although beautifully colored, such deposits are so thin and fragile as to be useless for jewelry.

A ~ is a layered gemstone with two layers cemented or glued together. This technique is often used with Opals to create a gem from a thin vein of precious Opal which would otherwise be too fragile to use.

~: A stone made of two components, generally held together with a clear or colored adhesive.
Emerald cut: See Step cut.

~: A method of combining two inexpensive stones and/or glass to imitate more valuable gemstones.

~ A ~ is a gemstone composed of valuable gemstone material in combination with other materials. It is found most often in opal, where an opal ~ contains a slice of opal glued to common opal, glass or other material.

This type of synthetic rubies are not much in vogue nowadays. However they make great gifts. ~s are usually stones of imitation backing with a natural corundum crown, generally made out of green or white corundum. When viewed carefully the joint made with glue can be noticed.

A stone consisting of two separate layers
Abbreviation for pennyweight

Edema collarettes
"Dog collar" meant for daytime wear which is usually made of a soft material laced to a series of jeweled bars ...

An assembled stone of two parts. Colorless cement or heat is used to join the parts together. Often used with Opals.
The combined characteristics of hardness, toughness and stability in gemstones. One of the deciding factors in gemstone value.

~: Two gemstones cemented together for durability or enhanced visual appeal, such as opal and black onyx.

A form of gemstone trickery that was devised to allow inexpensive materials to imitate the more valuable gemstones before modern synthetics were available.

Assembled opals combine natural opal with other materials. A ~ contains a slice of
opal glued to common opal, glass or other material. A triplet contains a slice of opal
glued between a base and a crystal or a glass top. Triplets are usually less expensive ...

A combination of a lesser value gemstone half glued to, usually, a half of colored glass, resulting in a gem that fakes the quality of a much more valuable stone.
dream beads ...

~ - A gemstone that is made from two layers to make the finished product more affordable. The lower part of the stone is glass or a non precious stone, and the top layer is the more expensive stone. Common with opals but can be found in other gemstones as well.

~: Any stone made of two component parts, frequently genuine stones combined with glass, plastics, or synthetic stones.
Drop: A small ornament suspended from a piece of jewelry. Photo and additional information.
Ear Clip: See "Clip." ...

~ is a composite stone which is made of two components, usually cemented or glued together with a clear adhesive.
Drop Cut ...

Any stone made up of two component parts or sections, such as a garnet overlaying green glass. They are often used as pendants.

~ A stone made of two pieces. Any natural or synthetic materials may be used in any combination.

Opal ~
An opal ~ is a manufactured stone that is composed of two thin layers that are glued together.

hollow ~ - A ~ in which the lower side of the crown portion or the top of the lower section has been hollowed out and filled with a colored liquid. Rarely seen. See ~.

An imitation gems where one layer of natural stone is glued or cemented with a second layer of synthetic stone or stone of lower quality.
Seen on double refractive gem when viewed, like inclusions, facet edges and scratches.

~ - an assembled gemstone with a crown portion of one material bonded to a pavilion portion of another material.
Double refraction - the separation of light passing through a substance into two rays.
This occurs in gems forming in all the crystals system except the cubic or isometric system.

A ~ is a layered gemstone comprising two layers cemented or glued together. Most frequently used to imitate valuable gemstones, the technique is also used with opals to create a stone from a thin vein of precious opal that would otherwise be too fragile to use.

~s and triplets
~s are stones that have been coated on the back generally to give it the appearance of having a black body color. Triplets are composite stones that have a thin slice of opal sandwiched in between a colorless quartz top and black coated bottom.

An assembled stone of two material bound together with a colorless cement

~s...A common method of building up sufficient thickness to permit a gem to be used in a setting. A non gem mineral is cemented to the top or bottom of the gem material. (See Opals.)
Dripstone...stalagmites or stalactites
Druse...A crystal coated surface of rock.

An assembled gem with two main components.
Drive by Citizen Eco-Drive ...

~: A stone manufactured in two layers to save expenses. The bottom layer is usually glass or non precious stone while the top is a precious or more expensive stone.

A ~ (also dublette) is a gem made from two layers in order to save expenses; the lower part of the composite stone is glass or a non-precious stone, the top is the more valuable stone. Many different types of ~s have been manufactured (including opal ~s).

Opal ~s and Opal Triplets - these are sandwiched stones made up of 2 or more pieces. Further information is provided.
teardrop closeup ...

Opal ~
Opal Inlay
A type of jewelry in which a solid opal is flush with the metal of a piece of jewelry.

Synthetic ~
A composite stone consisting of a piece of red synthetic spinel or synthetic corundum cemented alongside a piece of blue synthetic corundum, forming a pseudo-parti-coloured stone.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson ...

band worn around the head and usually jeweled and three dimensional Dog collar A wide collar of fabric, gemstones and or pearls worn high and tight on the neck Double clip Type of brooch consisting of two halves joined together on a frame which can be detached and worn singly ~ A ...

~: A stone composed of two different stones sealed together by a cement. This type of stone is called a composite. It was sometimes done to strengthen a gemstone or to enhance a gem's appearance. Dress Set: A jewelry suite designed for a gentleman's evening attire.

~:A method of improving gemstone durability or enhancing the visual impact by sandwiching a more valuable gemstone with either colored glass or a stone of lesser value.

About cabochons, ~s and triplets
In order to best bring out the play of colour in a Fine Opal, the stones are cut and polished to round or oval cabochons, or any other softly domed shape , depending on the raw material. Only the best qualities of Fire Opal, however, are suited to faceting.

1 Abalone high dome ~ gemstone cabochon 20mm diameter
1 Abalone high dome ~ gemstone cabochon 19.8 to 20mm diameter, 6.4 to 7.7mm thick. Natural abalone backing with glass dome.
0 review(s) ...

Diamond Pave Opal ~ Pendant 18kt Yellow Gold & Silver
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Opal History And Lore: ...

Ammolite is usually treated with a colorless, hard material to increase the strength of the stone and is often mounted as a ~ or a triplet (with a quartz top layer and a shale underside). Ammolite is only found in southern Alberta, Canada. AmorphousAmorphous means without form.

Thin seams of opal are often assembled with backing of opal or black onyx to produce a ~, and a clear quartz top is added to produce a triplet. In addition to making otherwise unusable material useful, the dark backing enhances the play of color, and the quartz top adds to durability.

Ammolite is sold in its natural form, as a ~ or as a triplet. A triplet is made of a dark gray layer of shale on the bottom and a cap of clear optical quartz or synthetic spinel on top.

A ~ contains a slice of opal glued to common opal, glass or other material. A triplet contains a slice of opal glued between a base and a crystal or a glass top. Triplets are usually less expensive than ~s, and both are less expensive than natural opals.

When the final gem is made of two different materials it is called a "~," and when made with three, a "triplet." Common ~ or triplet gemstones are emerald and Opal, usually combined with quartz or glass. Compositing is used to improve color and add durability.

White Opal
Yowah Nuts
Opal ~s
Opal Triplets
Opal Jewelry

Get down and dirty with real miners of opal as we take you on a journey to the outback of Australia. It's the home to not just one of the world's larget opal deposits, but also to some very interesting characters.

Opals-(various Combinations) ~s and Triplets
Garnet-Glass ~s ...

Boulder opal is described as thin layer of valuable opal that is inseparable from its ironstone template, producing a natural ~. It is cut into forms that pursue its usual fold. It is typically mostly found only in Queensland.

Ruby has also been produced by the flux, hydrothermal, floating zone and Czochralski processes. ~s consisting of natural sapphire crowns and synthetic ruby pavilions are fairly common, particularly in mining areas. Synthetics are also common at the mines, in both rough and cut forms.

It is also known as korite, calcentine, or Buffalo Stone. Ammolite is usually treated with a colorless, hard material to increase the strength of the stone and is often mounted as a ~ or a triplet. It is only found in southern Alberta, Canada.

At Spencer the precious opal occurs as one or more thin layers within common opal partially filling gas cavities within a rhyolite-obsidian flow. About 10% of the material is thick enough to cut into solid gems; the remainder is fashioned into ~s and triplets.

See also: See also: What is the meaning of Double, Stone, Jewel, Color, Gemstone?

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