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Rough White Topaz Brazil CODE: WTB01



We can suplly untill 800 kilos per month of  Rough White Topaz Brazil, has great crystallization and some cleanness , with following sizes :

2 - 5 grams - 34%
5 - 10 grams - 40%
10 -20 grams - 19%
20 grams up - 7%

Each 01 kilo of  Rough white topaz brazil after sliced we can get + - 200 grams of stone clean in the following  sizes:  

0.1 - 1 gram - 35%
1 - 3 grams - 35%
 3 - 6 grams - 20% 

6 grams up- 10%

We are quite careful in our evaluation of clean proportion of the Rough white topaz Brazil, it is probable that you get better quantity of clean pieces after sliced than we writted over here.

About price list, click here 



Topaz Chemical composition: Al2SiO4(F,OH)2
Class: nesosilicate
Crystal system: orthorhombic; 2/m2/m2/m
Crystal habit: commonly as euhedral prismatic crystals terminated by dipyramids, first and second order prisms, and basal pinacoids. Frequently with vertical striations on the prismatic faces. Also appears in crystalline masses.
Twinning: twins are very rare in topaz
Specific gravity: 3.4 - 3.6
Index of refraction: 1.606 - 1.638
Birefringence: weak (0.008-0.011)
Pleochroism: weak to moderate, tones vary depending on color of specimen
Hardness: 8
Color: commonly colorless, also light to medium blue, yellow/orange/pink/red/violet with or without brown tone, brownish green, brown.
Luster: vitreous
Transparency: transparent to translucent
Cleavage:perfect on {001}
Fracture: conchoidal, brittle
Streak: white
Fluorescence: mild flourescence in some crystals
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Topaz (Al2SiO4(F,OH)2) is an aluminum fluorosilicate. It most often occurs colorless, but can occur naturally in a variety of colors such as pale blue, yellow and brown. Much more rare are natural color 'Imperial' topazes with orange, pink, red or violet tones. The colors in topaz are mainly the result of color centers, which are sometimes affected to some extent by variations in the amounts of F,OH and minor impurities present, with the exception of the pink, red and violet tones in some topaz which are due to chromium impurities in the topaz crystal structure. Color centers are not fully understood, but it can be said that they are created by radiation and destroyed (reversed) by heating or in some cases by exposure to light.

These color causing 'color centers' can occur and be reversed by natural irradiation and heating processes, resulting in the variety of colors exhibited by natural color topazes, or they can be manipulated by artificial means. More than 99.9% of all blue topaz gems on the market today have undergone an irradiation treatment to produce their blue color.

Sky blue topaz gems are made from natural colorless topaz by passing electrons through the topaz (just like the electrons passing through the wiring of your home - known as electricity). The resulting sky blue color in the topaz is permanent throughout the gem and will never fade unless exposed to very high heat. In genuine sky blue topaz, there is no dangerous residual radiation in the topaz like there is with nuclear reactor irradiation - we have no nuclear reactor irradiated topaz, only sky blue topaz gems.

Some color centers in topaz are stable until heated hundreds of degrees while others are very unstable, fading within a few days merely by exposure to sunlight. The natural color of the yellow to 'sherry'-colored to brown topaz crystals from the Thomas Range in Utah, USA often exhibit this 'fast fading' phenomenon. Yellow to 'sherry'-colored to brown topaz crystals from some other locations do not fade when exposed to sunlight, indicating a light stable color center.

Much colorless topaz becomes a brownish-green color when irradiated. Subsequent exposure to light or heat will usually cause the brown portion of the color to fade leaving a blue color that is stable to light. Additional heating will cause this blue color to fade and the topaz will become colorless once again.

Some brown topazes that contain chromium impurities will become pink to violet upon heating. These colors are stable to light and this process can be reversed by subsequent irradition.

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Topaz is thought to form from fluorine bearing gases given off during the later stages of solidification in acidic igneous rocks, occuring in cavities and fissures within rhyolites and granites, and also in granitic pegmatites where it is commonly associated with quartz, microcline, muscovite, tourmaline, beryl and apatite.

Topaz occurs in metamorphic rocks by fluorine metasomatism in greisens and quartzites associated with fluorite, zinnwaldite, corundum and rutile. It also occurs (rarely) in schists.

Topaz appears in hypothermal ore deposits associated with cassiterite, hematite, wolframite and gold.

Due to topaz's hardness, it is often found in eluvial and alluvial deposits.

Topaz is characterized by its high specific gravity, hardness, crystal habit and cleavage.

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The name 'topaz' was used to refer to any yellow stone in ancient times. Topaz was first used to describe the mineral that we know today as topaz in 1747 when Henckel described the Saxony deposits. Even today one often encounters the erronious terms smoky topaz and madeira topaz being used for smoky quartz and citrine quartz, respectively. Until the 18th century, the name topaz was often used in refering to our present day mineral peridot.
The name 'topaz' is thought by many to be derived from the ancient Sanskrit word tapas meaning fire. Another theory which was first put forth by Pliny in the first century A.D. is that the name topaz was derived from the Greek word topazos or topazion meaning to seek, which was the name of an island in the Red Sea (known today as 'Zeberget', or the 'Island of St. John') which is thought to have been an ancient source for the gem peridot, but not topaz.
The term imperial topaz originated in Russia in the 19th century, when topazes with pink tones were discovered there and proclaimed by the Czar to belong only to himself and the royal family, and others to whom he had given it as a gift.

Topaz was one of the stones in the 'Breastplate of Judgement' of Aaron, described in the bible (Exodus: xxviii, 15-30). In Vedic astrology ( 1000's of years older than western astrology, and still practiced by millions today), topaz is asigned to the planet jupiter. Historically, topaz has been thought to give long life, good looks and to improve intelligence. It is also thought to provide protection from poison, disease and sorcery.

Topaz is used as a gemstone. Its perfect cleavage makes it susceptible to being damaged if struck upon a hard surface.

The astrological sign of topaz is Sagittarius.
Topaz is the symbolic gemstone for the 16th wedding anniversary.
Topaz is the birthstone for the month of November.

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Topaz is said to enhance one's spiritual potential, to increase intelligence and creativity, and to impart wealth & wisdom. It also is said to aid in meditation and in the manifestation of the desired outcome. It is said to facilitate working with other minerals, enhancing the results.
Topaz is said to be a strong rejuvenating and healing mineral, giving re-newed vitality and good health, and protection against many diseases.

In addition to the above metaphysical properties for topaz, Blue topaz is said to enhance one's communicative abilities, helping to more easily and clearly express oneself.

Topaz is a stone of strength.

Color: Pure topaz is colorless, but it also occurs in a broad range of colors: yellow, blue, pink, peach, gold, green, red, and brown.
Some natural yellow stones are heated to become permanently pink (pinked topaz).

Description: Topaz is an aluminum fluorite silicate containing fluorine and has a chemical formula of Al2F2SiO4. It is one of the few gem minerals which, under suitable conditions, grow into enormous crystals. Topaz typically occurs in cavities in rhyolites and granite, in pegmatite dikes, and in high-temperature veins with cassiterite and tourmaline.
The stone is transparent with a vitreous luster. A light yellow, brown and pink variety of topaz are valued as a gemstone. The pure crystals of topaz used a great deal in jewelry.

The name's origin: The name topaz is derived from the Indian Sanskrit word tapas, meaning fire. According to another theory topaz derives its name from the Island of Topazos, in the Red Sea, where the Romans obtained a stone which they called by this name, but which was the modern chrysolite or peridot.

Birthstone: Topaz along with citrine are birthstones of Scorpius (Scorpion): Oct. 24 - Nov. 21.

Wedding anniversary: Topaz is the anniversary gemstone for the 4th and 19th year of marriage.
Imperial topaz is the anniversary gemstone for the 23rd year of marriage.

Varieties: Nothing compares to the sparkling brilliance of Blue Topaz. Orange-red Imperial Topaz is rare.

Care and treatment: As topaz has a hardness of 8, keep your gems in separate boxes to protect other jewelry from scratches. Also avoid large temperature changes. Topaz often becomes paler if kept out in the sun. Do not clean topaz in a home ultrasonic cleaner. The best way to clean topaz is warm soapy water.

From the stone history: It is believed that the topaz of modern mineralogists was unknown to the ancients and that the stone called topazos was the mineral chrysolite or peridot.
In ancient times, a figure of a falcon carved on a Topaz was thought to help earn the goodwill of kings, princes and magnates. Topaz is Stone of Strength noted by Greeks. During medieval days it was thought to heal physical and mental disorders as well as prevent death.
In 1750 a Parisian jeweler discovered that the yellow Brazilian topaz becomes pink on exposure to a moderate heat, and this treatment has since been extensively applied, so that nearly all the pink topaz occurring in jewelry has been heat-treated. Such "burnt topaz" is often known as Brazilian ruby, as is the very rare, natural red topaz.

Shopping guide: Topaz looks beautiful in rings, bracelets, necklaces, and pendants. Blue Topaz is available in a variety of shades, sizes and shapes. Red and intense pink are the most rare and most desirable colors for topaz. Pure topaz when brilliant-cut sometimes is mistaken for diamond.

Healing ability: Topaz stimulates an endocrine system. It assists in general tissue regeneration. Topaz is valuable in the treatment of hemorrhages. It also increases poor appetite and helps fighting blood disorders.

Mystical power: Topaz balances emotions and calms passions. It releases tension and gives feelings of joy. Topaz is known as spiritual rejuvenation gemstone.

Deposits: Important sources of topaz are in Russia, Siberia, Brazil, Sri Lanka, Africa and China, Japan, Pakistan, Myanmar, Nigeria, Australia, Mexico, and in the United States (in Maine, New Hampshire, California, Colorado, and Utah). In the United States the best topaz has been worked near Pikes Peak, Colorado, and in San Diego county, California. The largest known deposits are located in Minas Gerais in Brazil.
The finest British topaz is found in the Cairngorm Mountains in the Central Highlands, especially at Ben a Buird, Scotland. The famous topaz rock of the Schneckenstein, in Germany, yields pale yellow crystals.
Fine topaz occurs at several localities in the Urals and in Siberia, Russia, and beautiful crystals come from Takayama and Tanokamiyama in Japan.

The information for mineralogist: Topaz has a hardness of 8.


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