e/Doublet (lapidary)

Information
has gloss	eng: A doublet is a type of gem composed in two sections. It is sometimes used to imitate other, more expensive gems.
lexicalization	eng: doublet
instance of	(noun) a crystalline rock that can be cut and polished for jewelry; "he had the gem set in a ring for his wife"; "she had jewels made of all the rarest stones" stone, gemstone, gem