Citrine & Smokey Quartz phantoms, rainbows, freeform

Citrine is a variety of quartz that's found in igneous, metamorphic, and sedimentary rocks. It's a macrocrystalline mineral based on silicon dioxide, and its color comes from traces of iron. The name "citrine" comes from the French word citron, which means "lemon".

Natural citrine is rare, and most citrine on the market is heat-treated. Heat-treated citrine has a slightly reddish tint. Gem-quality transparent citrine with good color is also very rare, with the best examples coming from Brazil, Madagascar, and the former USSR. 

Citrine is scratch resistant enough to be used in jewelry, such as rings and bracelets. Its value is determined by a number of factors, including color, clarity, and cut. Popular colors include vivid yellows, reddish oranges, and earth tones. Citrine is also known as the Merchant's Stone or the money stone, due to a superstition that it helps you acquire wealth.