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Learn about topaz, a gemstone with a wide color range and pleochroic properties. Find out its history, lore, treatments, quality factors, and more from GIA, the world's foremost authority on gems.
Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2. It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange.
Learn about the different colors, qualities, and treatments of topaz, the November birthstone. Find out how to identify, buy, and care for this popular gemstone.
Topaz is a rare silicate mineral with a hardness of 8 and a wide range of natural and treated colors. Learn about its physical properties, geologic occurrence, sources, treatments, and uses as a gemstone and birthstone.
What is Topaz? Topaz is a rare silicate mineral that occurs in a wide variety of colors. It is one of the most popular colored stones and measures 8 on the Mohs scale for hardness, meaning that it can be worn safely as jewelry in many everyday situations. It is usually found in small, polished crystals that are transparent and pointed.
Learn about Topaz, a popular and abundant gemstone with various colors and treatments. Find out its chemical formula, hardness, luster, cleavage, and sources, as well as its false names and similar gemstones.
