[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] A doublet is a type of assembled gem which is composed of two parts.
[5] A triplet is a type of assembled gem composed of three distinct parts.
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