Citrine is a member of the Quartz species. It is so named due to it's lemon yellow
color. Colored by it's iron content, natural specimens are quite rare. Commercial Citrine these days are most
likely heat treated Amethyst or Smoky Quartz. Mostly all of heat treated citrine has a slight reddish tint to
them. Pale yellow generally denotes a natural stone.
Natural-colored citrine are mined from Madagascar, Brazil, Argentina, Burma, Namibia, Russia, Scotland, Spain and
the United States.
Color: Light to dark yellow, gold-brown
Mohs' Hardness Scale: 7