Saturday, July 21, 2012

Tiger eye Gemstone


Tiger eye Gemstone



Tiger's eye



Tiger's eye quartz is made up of brown iron which yields its golden yellow color. Cabochon lower stones of this variety exhibit the chatoyancy (tiny ray of sunshine for the floor) that resembles the feline eye of the tiger. The most important deposit is in South Africa, nevertheless tiger's eye is usually present in Western Australia, Burma (Myanmar), India and California.







Tiger's Eye



Tiger Eye Gemstone , much like the eyes of a feminine cat, glitters having a smaller ray of light for the floor. This residence of stone is thought as chatoyancy. It's a brown quartz silicon dioxide getting lustrous yellow and brown parallel fibers. The existence of iron oxides presents the stone the colour of yellow-gold.



Tiger's Eye is extremely well-liked in jewellery generating. It has the grounding power of the earth, but embellished with glowing warmth. This stone is ideal for people today in need of much more self-confidence to accomplish their aims. It helps people to acknowledge self methods and use it for that attainment in their dreams other than creating them choose scenarios and figure out the very best method to strategy it. Roman troopers wore it, engraved with symbols, to protect them for the duration of fight.



Tiger's Eye is the anniversary stone to the ninth yr of relationship and astrological indicator for capricorn. It is found in the locations of South Africa, though the very best stones is acquired from West Griqualand.



Physical Attributes:



Tiger's Eye is usually a long lasting quartz composite using the usual quartz hardness of seven. It commences as the fibrous blue mineral termed crocidolite, that's comprised of iron & sodium. Most of us regarded crocidolite as asbestos. The transformation starts when quartz becomes imbedded between the fibers of crocidolite. This process will result in one of two gemstones. A bluestone identified as Hawk's Eye or the golden brown stone identified as Tiger's Eye.Throughout the process, the asbestos is completely dissolved. Even so the quartz takes on the fibrous formations and the blue color of crocidolite. This creates the parallel lines within the gem which provides it that ever shifting play of sunshine and movement, the stone is so loved for. This is additionally known as chatoyancy. This gleam that rolls across its floor. Much like the eyes of a cat. Even nevertheless the iron & sodium dissolve, traces of hydrated oxide of iron deposit between the crocidolite and quartz, creating the golden coloration that is common to Tiger's Eye. How a great deal of the hydrated mineral is deposited will figure out how Golden brown, red, green or blue, Tiger's Eye and Hawk's Eye will be. The rarer blue Hawk's Eye will have only the slightest amounts.



The varying amounts of hydrated oxide of iron, actually cause several colors and mixes of colour. When the colour is actually a greenish gary, it is termed cat's-eye quartz. A golden yellow reflection on a brown stone, is termed Tiger's Eye. If the stone is blue gray or bluish, it's recognised as Hawk's Eye. Redish brown, or mahogany colored stones, are acknowledged as bull's-eye or ox-eyeTiger's Eye is also a pseudomorph (from the Greek for "false form"). Pseudomorphs form when one mineral replaces another. Tiger-eye is often a quartz replacement of crocidolite. Thus it is a pseudomorph of quartz after crocidolite. The process is similar to that which takes place when quartz replaces wood to produce petrified wood.



LOCALITIES:



In my younger days the old timers maintained that Tiger's Eye was only found in Africa.Today I find this to be only a half truth. It really is true that Tiger Eye's major commercial source is Cape Province, South Africa. But There are several locations that have Tiger's Eye. Far more to the point. Tiger's Eye mixed with other materials or Tiger's Eye like materials. They are all quartz replacements of fibrous minerals and show some chatoyance.Unfortunately, On May 10, 1968, Dr. Carol de Wet, then Minister of Mines from the Republic of South Africa. Announced an embargo on the exportation of uncut Tiger's Eye that gradually eliminated all export of rough Tiger's Eye, by May of 1971. His intent being to create a South African monopoly on finished Tiger's Eye gems.It truly is said that huge quantities were smuggled out. But smuggling costs money and the price of rough increased considerably faster than the buying public's willingness to pay. Nowadays, even



at large gem shows, you really have to search long and hard to find any rough Tiger's Eye. However regular golden Tiger's Eye gemstones, are not too expensive. On the other hand these stones are mostly just the golden coloration. We have some of the older more rare colour mixes.



Another rare Tiger's Eye like stone we have, is Binghamite. Binghamite is composed of quartz and fibrous silicates with inclusions of goethite and/or hematite. It is a highly prized gemmy material using a chatoyant luster, similar to Tiger's Eye. It's is usually red or yellow and may have black streaks of hemitite and sometimes blocky patches of white quartz.



It can be a really interesting alternate to Tiger's Eye. It really is present in the Cuyuna Iron Range of Minnesota. Silkstone is analogous to binghamite although the fibers are randomly oriented and it is not so highly prized."Australia has a stone termed Tiger Iron. Some tiger-iron is all golden just just like the South African Tiger's Eye and is called Australian Tiger's Eye, by some American dealers. Some is much more of the mixture, with visible streaks of red jasper. If it's mostly jasper, some dealers call it Tiger's Eye Jasper. Some also incorporates silvery gray hematite. This wide range is named Tiger Iron by pretty considerably everyone.



Pietersite is actually a chatoyant, solidified crocidolite asbestos, but its appearance is quite different because it's been broken into fragments (brecciated, in mineralogical terms), stirred around, and re-cemented by silica. The result can be a patchwork of shades of blue, yellow, brown, and



red. Pietersite originally present in Namibia. Is now also coming from Henan Province, China. We have also seen adds for Golden Chinese Tiger's Eye. The Chinese pietersite is quite similar to the Namibian one, but it has additional red shade and distinctive golden-red combinations.



There are also some materials from California and Arizona that might qualify. The California type applies to a silica-impregnated, white-to buff-colored, massive, fibrous tremolite (another asbestos mineral) that was collected for many years at Iowa Hill in Placer County.



The Arizona variety consists of fibers of chrysotile (also another asbestos mineral) in serpentine. As a rule neither of these stones are quite impressive.



We have heard of other localities. Such as Sri Lanka (Ceylon), India, Brazil and Burma. But I haven't seen a lot information on these localities



HISTORY & FACTS:



The fibers in Tiger's Eye may be an inch or two long and really thin. Most are only 0.001 millimeters, or 0.000039 inches, in diameter.



Tiger's Eye has a fibrous structure. and sawing can be tricky. Because nature seldom grows the fibers straight. They are usually bend or twisted. Cuts must be exactly parallel to the length of your fibers to get the full chatoyant effect. If the saw cut is perpendicular to the fibers. You end up with a lifeless, dark brown to black stone.



While about the subject of cutting, even while in most tiger-eye the fibrous mineral has been completely replaced by quartz, recent research has shown that quartz dust can be hazardous to breathe. So when working quartz or any stone. Take adequate precautions to avoid breathing any from the dust.



In most cases Red Tiger's Eye is not a natural occurrence. It is usually a result of deliberate heating. Heat treating can be done using the kitchen oven. First fill a can or some sort ofmetal container with sand. To shield the tiger-eye from thermal shock during heating. Cover slabs of ordinary, yellowish Tiger's Eye in fine clean silica sand, at least 3" deep.



You can get this sand at your local lumber yard. It is used for sand blasting. Place them in a cold oven and increase the temperature 50°F every hour until it reached 400°F. Then turn the oven off. Do not open the door. Allow plenty of time for the container to cool all the way through.



Soon after Tiger Eye's discovery during the late 19th century. Idar-Oberstein lapidaries



discovered they could bleach tiger-eye to an evenly colored mild yellow. By using either hydrochloric or oxalic acid. When properly oriented and slash, this material could yield a sharp cat's-eye stone. Which was a lot more than just a little reminiscent of "real" cat's-eye. An expensive selection of chrysoberyl.



Tiger's Eye also shows a cat's-eye effect. It just isn't the same color as the mild yellow chrysoberyl. Other gems that demonstrate a similar effect are cat's-eye opal and cat's-eye



tourmaline. Both effects are referred to as chatoyant. "Chatoyant" comes from the French word for "cat." and these stones do gleam like a cat's eye.



Tiger's Eye may be the anniversary gemstone for the 9th 12 months of relationship.



tiger's eye



Polished tiger's eye gemstone



Tiger's eye (also Tigers eye, Tiger eye) can be a chatoyant gemstone that is usually yellow- to red-brown, by using a silky luster. It is just a fibrous silicified crocidolite (blue asbestos), a classic example of pseudomorphous replacement. An incompletely silicified blue variant is referred to as Hawk's eye. A member on the quartz group, its physical and optical homes are identical or pretty near to those of single-crystal quartz.



The Tiger eye gems are usually cut en cabochon in order to very best display their chatoyancy. Red stones are brought about through gentle heat treatment. Honey-coloured stones have been used to imitate the significantly higher valued cat's eye chrysoberyl (cymophane), nevertheless the overall effect is unconvincing. Artificial fibreoptic glass is really a common imitation of tiger's eye, and is produced in a wide range of colours.



Tiger iron



Tiger iron is an altered rock composed chiefly of tiger's eye, red jasper and black hematite. The undulating, contrasting bands of color and luster make for an attractive motif. Tiger iron is a well-known ornamental material used in a variety of applications, from beads and cabochons to knife hilts. Along with tiger's eye it can be mined primarily in South Africa and Western Australia. Tiger's eye is primarily composed of silicon dioxide (SiO2) and the specific gravity ranges from 2.64 -2.71

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