THE MATERIAL LIBRARY
Citrine
Yellow to orange quartz.
Colors & patterns
Pale yellow, honey, gold and orange-brown.
Typical origins
Brazil is a major commercial source; natural citrine also occurs in other countries.
Hardness
7 on the Mohs scale.
Choosing & setting this material
Much commercial citrine is produced by heating amethyst. Both natural-color and heated material can be attractive; the treatment should be disclosed.
Care & cleaning
Clean gently with lukewarm water, a little mild soap and a soft cloth, then dry. Avoid steam, ultrasonic cleaners, harsh chemicals and sudden temperature changes, especially when treatments are unknown.
Origins above describe typical sources of the material, not the origin of an illustrated or stocked stone. Hardness measures scratch resistance, not resistance to breaking. Confirm the identity and treatments of the actual piece.
Further reading: Material reference · GIA: gem treatments