Topaz is a crystal whose attributes have long been appreciated for thousands of years. The topaz has a hardness of 8 on the Mohs scale, which exceeds that of quartz; in fact, it is the hardest of the silicate minerals, with a chemical formula of Al2SiO4(F,OH)2. When polished, the gold color of topaz is virtually indistinguishable from citrine, the golden variety of quartz. Topaz is quite fragile if dropped (cracks easily), and has a vitreous luster with a range of colors which can be altered depending on the treatment applied. It is highly amenable to color change. Location Topaz is
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