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Because they tend to be rather pale, man must to supply irradiation and sometimes also the heat.
Wiki User
∙ 6y ago
Wiki User
∙ 13y agoTopaz is made of Al2SiO4(F,OH)2.
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5 why is Gypsum is a 2 on Mohs hardness scale while topaz is an 8 Can gypsum scratch topaz?
No, gypsum cannot scratch topaz. Minerals with a higher number on the Moh's Hardness Scale can scratch minerals that are lower-numbered, but lower numbers can't scratch higher numbers. A mineral would have to have a number higher than an 8 on the Moh's hardness scale in order to scratch topaz.
Is topaz used for anything else other than jewelry?
Topaz has many uses besides just jewelry. Along with being the birthstone for the month of November, it is also commonly used as a form of crystal energy. Many people believe that crystals have energy waves. These energy waves are said to have various effects on the human body depending on the type of stone. Topaz, specifically, is said to be able to calm the nerves, warm the body, improve eye strain and sight, and even aid in the treatment of mumps. The use of topaz can also be dated back to ancient times. Ancient Egyptians believed that those who wore topaz would be safe from injury, while the Romans believed it could help failing eyesight. In the industrial world, topaz can be used in such products as knife sharpeners and sanding equipment as an abrasive.
Do you have to mix any colours to make red green or blue?
Green can bemade by mixing yellow and blue. However, red and blue cannot, because they are primary colors. Correct me if I'm wrong, but they might all be primary colors... Just know that green can be made by mixing blue and yellow. Red and blue cannot be made with anything. (However, if you mix them together, they make purple).
What can you infer about the recessive trait of the Bonnie Blue parent plant?
You can infer that the Bonnie Blue Parent Plant's parents have made babies and the babies have inherited the features of the Bonnie Blue Parents .
What are primary and secondary colors?
The primary colors are "Red" "Blue" and "Yellow. The secondary colors are the colors that are made by mixing the primary colors. Examples : Blue + Red = Purple Red + Yellow = Orange Yellow + Blue = Green.
What is the density of Blue Topaz?
the density of the blue topaz is the mass divided by the volume
What is the gemstone for November?
yellow topaz November Gemstone: Citrine, Yellow Topaz November Birthstone Color: Yellow
What is the luster of a blue topaz birthstone?
Luster of Topaz is Vitreous
Where is the home of the blue topaz?
you can find blue topaz in Brazil, Sri Lanka, Pakistan and Russia!
What is colors of Topaz?
Pure topaz is colorless and transparent but is usually tinted by impurities; typical topaz is wine, yellow, pale gray, reddish-orange, or blue brown. It can also be made white, pale green, blue, gold, pink (rare), reddish-yellow or opaque to transparent/translucent.
How much did the biggest blue topaz weigh?
Thar marbella stone I think it was called, which is the biggest blue topaz.
Is the blue topaz the birthstone December?
it is the Blue Zircon
What is the pualities of blue topaz?
See this link. Do not believe in the fantastic qualities of topaz !
What color of topaz can you get?
Topaz is a gemstone of all colors (Orange, yellow, brown, light blue to deep sky-blue, pink, colorless, white, light purple, greenish-blue, green), and its most valuable color is a golden orange-yellow, called "imperial topaz". Topaz is commonly thought of as a sky-blue gem, but it was not until this century that blue topaz became widespread on the gem market. Natural blue topaz with a deep hue is very uncommon in nature; colorless to light hued stones are heat-treated to achieve the blue color. Likewise, topaz rarely occurs naturally in pink; virtually all pink topaz is heat treated from yellow or brownish material. Some topaz from Russian localities are notorious for fading upon prolonged exposure to light. Stones from these localities are undesirable as gems. One should always inquire about the origin of the topaz before buying it to make sure it will not fade. Topaz of all different colors are used in jewelry. The orange, pink, and blue colors are most often cut for gems, and colorless topaz is sometimes cut with the brilliant cut, resembling diamond. Topaz is sometimes found as enormous flawless crystals, and some gigantic gems and faceted spheres have been formed from them, making unique and exquisite gem pieces. Topaz is rarely cut into cabochons.VARIETIESOn the gem market, topaz is usually classified by color. Below is a list of the color names designated for gem topaz:Pink TopazBlue TopazBrown TopazGreen TopazOther names may be designated to certain types of topaz:Precious Topaz - used to distinguish topaz from cheaper fakes, such as citrineImperial Topaz - lustrous orange-yellow to orange-brown variety of topaz (most valued)Silver Topaz - colorless topazSherry Topaz - orange-brown topazLondon Blue Topaz - deep blue topaz (the deepest blue form of topaz)Swiss Blue Topaz - deep blue topaz (not as deep blue as London blue topaz)Paraiba Topaz - sea-green topazFalse names:Smoky Topaz is also a false name for Topaz. It is used by unscrupulous dealers to describe Smoky Quartz.Hyacinth is an orange-yellow to yellow-brown variety of Topaz. Although the name Hyacinth usually is used to describe a gem variety of Zircon of that color, it is occasionally used for Topaz as well (usually in old manuscripts). Pycnite is a columnar variety of Topaz. It may also refer to a yellow-white variety Gold TopazGolden TopazMadeira TopazFalse TopazBrazilian TopazBahia TopazCitrine TopazBrazilian Topaz - yellow to yellow-brown sapphireIndian Topaz - yellow to yellow-brown sapphireKing Topaz - yellow to yellow-brown sapphireOriental Topaz - yellow to yellow-brown sapphireSmoky Topaz - unscrupulous name for cut smoky quartzStar Topaz - yellow star sapphireThere is also Mystic topaz, which is not a natural topaz is it made by adding some chemicals on the base on the colorless topaz to make it look colorful and is often cut in concave style to enhance the luster. Note: Citrine (a yellow-brown variety of Quartz) closely resembles yellow-brown Topaz. Unfortunately, unscrupulous dealers have adapted false name for Citrine so the unaware buyer thinks he is buying the more valuable Topaz. Any "Topaz" labeled with a prefix name (such as Gold Topaz, Madeira Topaz, False Topaz, Brazilian Topaz, Bahia Topaz, and Citrine Topaz) is heat-treated Citrine. However, there are three exceptions:
What color is topaz in its pure state?
Topaz usually shows up as being a yellow color in it's pure state. Blue topaz appears as blue in it's natural state.
What color is topaz in pure state?
Topaz usually shows up as being a yellow color in it's pure state. Blue topaz appears as blue in it's natural state.
How valuable is blue topaz?
1,400$
