citrine

n. yellowish variety of quartz that is often sold as topaz; light greenish-yellow color

For the politician of this name, see Walter McLennan Citrine, 1st Baron Citrine. Citrine, also called citrine quartz is variety of quartz. It ranges in color from a pale yellow to brown. Citrine has ferric iron impurities, and is rarely found naturally. Most commercial citrine is in fact artificially heated amethyst or smoky quartz. Brazil is the leading producer of naturally mined citrine, with much of its production coming from the state of Rio Grande do Sul.
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(n.)
A yellow, pellucid variety of quartz.
  

(a.)
Like a citron or lemon; of a lemon color; greenish yellow.
  

A variety of quartz, citrine occurs in a color range ranging from light yellow to a brilliant orange that may be confused with fine imperial topaz.

Noun
1. semiprecious yellow quartz resembling topaz
(hypernym) quartz