Citrine is the yellow to orange variety of Quartz. Natural Citrine is not common; most Citrine on the gem market is produced by heat treating Amethyst and Smoky Quartz. It takes a relatively low temperature to change the colour light to golden yellow, and heating to higher temperatures will give the stone a darker yellow to brownish-red colour. The name Citrine is derived from the citron fruit, a yellow fruit similar to the lemon. (In fact, citron means "lemon" in several languages).
Citrine is every so often very faded or almost colourless. Among deeper colored stones can be seen wine-yellow, honey-yellow, and saffron-yellow specimens, whilst others have quite a mentioned brown tinge. Stones of a deep brownish-yellow colour are very much like topaz, and people of a quality golden-yellow are quite same in splendor to yellow topaz and can scarcely be distinguished on mere inspection from latter stone except by using an professional.
Natural citrines are rare. Most commercial citrine is heat-treated amethyst or smoky quartz. Because the colour is now caused by finely distributed iron minerals (mostly hematite and goethite), heated amethyst is not a citrine in the strict sense. Quartz coloured by inclusions of any kind is not called a citrine.
Citrine is a transparent, yellow type of Quartz, ranging in coloration from pale to golden yellow, honey or almost brown, and might comprise rainbow or sparkle inclusions. The name comes from the French phrase citron, which means lemon. It became used as a gem in Greece as a long way back as three hundred B.C., and due to its shade, is once in a while mistakenly known as Gold Topaz, Madeira or Spanish Topaz, or Safranite. Much of the industrial Citrine on the market is heat-handled Amethyst or Smoky Quartz that produces an stronger Citrine coloration, commonly a deeper amber or orange-reddish colour. Most Natural Citrine is a faded yellow shade.
Properties of Citrine
|Colour||Yellow, Orange, Brown|
|Refractive Index||1.54 - 1.55|
|SG||2.63 - 2.65|