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Topaz can be used as a flux in steel production. [23] Using topaz as a refectory material does have some health and environmental concerns due to the production of fluorine as a byproduct of calcining topaz. Topaz is a part of the second rank of gemstones, or semiprecious stones, accompanying aquamarine, morganite, and tourmaline. [7]
Topaz, a silicate mineral of aluminium and fluorine; Chrysoberyl, an aluminate of beryllium; Zircon, a mineral belonging to the group of nesosilicates; Prehnite, an inosilicate of calcium and aluminium; Tourmaline, a crystalline boron silicate mineral compounded with other elements; Apatite, a group of phosphate minerals
American Golden Topaz, the largest cut yellow topaz, weighing nearly 23,000 carats (4.6 kg). Chalmers Topaz, a 5,899.5-carat (1.17990 kg) cut topaz. Tsavorite
Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements.. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [1]
Peridot (/ ˈ p ɛ r ɪ ˌ d ɒ t,-ˌ d oʊ / PERR-ih-dot, -doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine.Peridot is one of the few gemstones that occur in only one color.
According to Strabo, "The topaz is a transparent stone sparkling with a golden lustre, which, however, is not easy to be distinguished in the day-time, on account of the brightness of the surrounding light, but at night the stones are visible to those who collect them.
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The most commonly irradiated gemstone is topaz, which usually becomes blue after the process. [3] Intensely blue topaz does not exist in nature and is the result of artificial irradiation. [ 27 ] According to the American Gem Trade Association, approximately 30 million carats (6,000 kg or 13,000 lb) of topaz are irradiated every year globally ...