Article · Wikipedia archive · Last revised Jun 9, 2026

Assembled gem

An assembled gem is a gemstone made up of other smaller gems. An assembled gem can often be a fake gem with a desirable piece of gemstone attached to pieces of inexpensive imitation gemstones. For example, a combination of a thin layer of green glass and a colorless piece of quartz would be a composite gem.

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Jun 9, 2026
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Opal triplet: A thin slice of opal between a top or rock crystal and a bottom of agate. source ↗

An assembled gem (also called a composite gem)1 is a gemstone made up of other smaller gems.2 An assembled gem can often be a fake gem with a desirable piece of gemstone attached to pieces of inexpensive imitation gemstones.3 For example, a combination of a thin layer of green glass and a colorless piece of quartz would be a composite gem.4

Types

A doublet is a type of assembled gem which is composed of two parts. A false doublet is a doublet which is a glass piece that looks like a real gem and a real gem that have been attached to look like a larger gem.5 A triplet is a type of assembled gem composed of three distinct parts.5

References

References

  1. Read, P. G. (2013-10-22). Gemmology. Elsevier. ISBN 9781483144672.
  2. "Assembled gem". The New Encyclopaedia Britannica. Encyclopaedia Britannica. 1992. ISBN 9780852295533.
  3. "Fake Gemstones". The Spruce. Retrieved 2017-10-20.
  4. Petersen, Christine (2010-01-01). Groovy Gems. ABDO. p. 23. ISBN 9781616139339. composite gem.
  5. Matlins, Antoinette Leonard; Bonanno, Antonio C. (2009). Jewelry & Gems, the Buying Guide: How to Buy Diamonds, Pearls, Colored Gemstones, Gold & Jewelry with Confidence and Knowledge. Gemstone Press. ISBN 9780943763712.