Topaz is named from Greek "topazion" for a type of gemstone, probably after Sanskrit "tapas" - fire, alluding to the brilliance of gem-quality material. Topaz has been known from antiquity. White Topaz also known as clear topaz or silver topaz is colorless, transparent, hard and durable gemstone.
Topaz Treatments:-
Irradiation followed by heat-treatment produces most blue colors. Irradiation also produces yellow, orange, red, brownish, pinkish and greenish colors: often unstable, may fade upon direct exposure to sunlight. Coated entirely or partially: may show peeled coating at facet junctions, iridescence (reflecting light), spotty coloration. Some surface-treatments are removed only with acids (mostly green and blue) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 5
Significant Gem Localities:-
Mined in Brazil, Pakistan, Afghanistan, India, China, Burma, Sri Lanka, Japan, Russia, Ukraine, Australia, Madagascar, Namibia, Nigeria, Zimbabwe, Mexico, U.S.
Hardness 8
WEIGHT PER PIECE OF WHITE TOPAZ
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OVAL SHAPE
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OCTAGON SHAPE
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PEAR SHAPE
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ROUND SHAPE
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SQUARE SHAPE
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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SIZE
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WEIGHT
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5*3MM
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0.37
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5*3MM
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5*3MM
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3MM
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0.13
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3*3MM
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0.19
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5*4MM
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0.43
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6*4MM
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0.72
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6*4MM
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0.47
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4MM
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0.35
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4*4MM
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0.44
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6*4MM
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0.59
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7*5MM
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1.3
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7*5MM
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0.88
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5MM
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0.55
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5*5MM
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0.94
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7*5MM
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0.94
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8*6MM
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1.86
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8*5MM
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1.05
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6MM
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1.02
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6*6MM
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1.4
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8*6MM
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1.14
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9*7MM
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2.74
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8*6MM
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7MM
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1.5
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7*7MM
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2.18
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9*7MM
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2.12
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10*8MM
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4.17
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9*6MM
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1.67
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8MM
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2.31
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8*8MM
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10*8MM
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3.13
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11*9MM
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7.61
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10*7MM
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2.38
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9MM
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10*10MM
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11*9MM
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4.4
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12*10MM
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11.23
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12*8MM
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3.75
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10MM
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12*10MM
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14*10MM
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14*10MM
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