Citrine has been summarized at various times as yellow, greenish-yellow, brownish yellow or orange. Topaz is available in a variety of colors from yellow, orange, gray, purple, blue, black, violet and green.Ĭitrine is a november birthstone color, a medium deep shade of golden yellow. Diversity in color is also caused by changes produced by the gemstone industry. The wide range of topaz colors available are due either to natural trace impurities or crystal structural defects. Natural topaz is translucent and colourless. It is nearly impossible to differentiate between cut citrine and yellow topaz visually, but they differ in hardness. However, a heat treated amethyst will have small lines in the crystal, as opposed to a natural citrine‘s cloudy or smokey appearance. Most commercial citrines are heat-treated amethysts or smoky quartz. CitrineĬitrine is a variety of quartz whose color ranges from a pale yellow to brown due to ferric impurities. This hardness combined with its usual transparency and variety of colors means that it has acquired wide use in jewellery as a cut gemstone as well as for intaglios and other gemstone carvings. It is one of the hardest naturally occurring mineral and is the hardest of any silicate mineral. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces.
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