Properties topaz is a silicate stuff of aluminum and fluorine. Topaz is also available in numerous cuts and sizes all at affordable prices. Topaz comes in many colors including clear brown yellow orange red pink and blue. Some of the largest gemstone pieces ever cut were of topaz. Topaz that has undergone this treatment and been turned dark blue is sometimes used as a simulant for aquamarine these are distinct gem species.
Topaz is also pleochroic meaning that the gem can show different colors in different crystal directions. The el dorado topaz is the largest faceted gemstone in the world and weighs an incredible 31 000 carats. However since topaz is typically less expensive than aquamarine consumers should be wary of unscrupulous vendors who may try to sell treated topaz as aquamarine. Red pink purple yellow orange brown blue green colorless. Topaz is a silicate mineral of aluminium and fluorine with the chemical formula al 2 si o 4 f oh 2 topaz crystallizes in the orthorhombic system and its crystals are mostly prismatic terminated by pyramidal and other faces.
Topaz of any type is an excellent jewelry stone due to its hardness 8 on the mohs scale and high refractive index. Topaz is named from greek topazion for a type of gemstone probably after sanskrit tapas fire alluding to the brilliance of gem quality material. In the 18th century it was mined there during a period of over 60 years. Why buy topaz gemstones. Blue topaz is the gem of the fourth wedding anniversary and imperial topaz is the gem of the 23rd wedding.
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An alternate explanation especially popular in brazil is that it dates from an 1881 visit by brazilian emperor pedro ii to ouro preto the town closest to brazil s most productive topaz mines and the gift of a reddish topaz to him. Topaz crystallizes in orthorhombic form and crystal is prismatic terminated by pyramidal and other faces. However it does have perfect cleavage which can make it prone to. Topaz has been known from antiquity. It is an emerald cut yellow topaz gem that was mined in brazil and before it was cut weighed 37 kg.It is one of the hardest naturally occurring minerals mohs hardness of 8 and is the hardest of any silicate mineral this hardness combined with its usual transparency. Topaz is a hard and durable gemstone and will not dissolve in most chemical solvents. It is the largest cut yellow topaz in the world and one of the largest faceted gems of any type in the world. Colorless topaz is plentiful and is often treated to give it a blue color. It can be found in huge and flawless crystals which can be faceted into giant gemstones which can weigh thousands of carats.
What colors and varieties of topaz exist. Topaz actually has an exceptionally wide color range that besides brown includes various tones and saturations of blue green yellow orange red pink and purple. Topaz is a fairly common and inexpensive gemstone. Topaz occurs in a broad colour change. What colors and varieties of topaz exist.
Topaz occurs in a broad colour change. It is one of the hardest naturally occurring minerals mohs hardness of 8 and is the hardest of any silicate mineral this hardness combined with its usual transparency. An alternate explanation especially popular in brazil is that it dates from an 1881 visit by brazilian emperor pedro ii to ouro preto the town closest to brazil s most productive topaz mines and the gift of a reddish topaz to him. Topaz of any type is an excellent jewelry stone due to its hardness 8 on the mohs scale and high refractive index. Topaz is also pleochroic meaning that the gem can show different colors in different crystal directions.
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Topaz is a fairly common and inexpensive gemstone. Properties topaz is a silicate stuff of aluminum and fluorine.
