Topaz is a well-known mineral, occurring in large and beautifully shaped and colored crystals. It naturally occurs in many colors, but rarely in pink, purple, and deep blue. Those colors are formed from lighter-colored stones that undergo irradiation and heat treatment. Topaz from certain localities may also turn pink or colorless upon heating.
ادامه مطلبTopaz Quality Factors. Blue topaz makes a perfect gem material for artistic carvings. - Lydia Dyer, courtesy of John Dyer & Co. Color. Red is one of the most sought-after topaz colors and represents less than one-half of 1 percent of facet-grade material found. The color the trade calls imperial topaz is highly prized and very rare.
ادامه مطلبTreated Blue Topaz - A Manufacturer's Dream. A manufacturer preparing to supply a large retail chain often has difficulty finding an adequate supply of gemstones.The company needs thousands of gems with a consistent color, clarity, cut and size. This will be a huge faceting job, but it can also be a huge sorting job if the gemstones vary in color.
ادامه مطلبHowever, even simple tests, such as applying solvents (alcohol, acetone) with a cotton swab and seeing if any color comes off, can sometimes quickly and effectively expose dye treatments. Heating and Irradiation The effects of heat and irradiation on gems are sometimes unpredictable. In other cases, they can improve gem color. Topaz
ادامه مطلبThe reason is that the coating has a strong tendency to flake off during the setting process and during normal wear and tear. Secondary Tests: The colors of the mystic topaz will be the secondary test. Anyone with even a basic understanding of natural topaz colors will quickly identify these stones to be artificially colored.
ادامه مطلبTopaz is the hardest silicate mineral and one of the hardest minerals in nature, and a very popular gemstone for jewelry. In the ancient past, topaz was always associated with the yellow color, and all yellow and golden-hued gems were called topaz. Fine topaz normally occurs as a colorless crystal, though other colors, such as pink, blue, green ...
ادامه مطلبThis is your approximate reading, to two decimal places or the nearest hundredth (0.01). Now place the magnifying lens on the viewing lens and take a more specific reading, rounded to three decimal places or to the nearest thousands (0.01). Leave the stone on the crystal for birefringence testing.
ادامه مطلبTanzanite treatment. I've heard of coating tanzanite cobalt for coor. Is this common. What can I look for ? I have 120x mag, but I'm not seeing anything odd, and I have 40 pieces from 15 diffrent sources. Figured this is the place to ask. I don't think any of mine are but I prefer to be darn sure. A subreddit to discuss and showcase gemstones!
ادامه مطلبTopaz (/ ˈ t oʊ ˌ p æ z / TOH-paz) is a silicate mineral of aluminium and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it …
ادامه مطلبThe largest faceted topaz and gemstone in the world. The "El-Dorado" rough topaz discovered in 1984, in Minas Gerais, Brazil, weighed an astonishing 37 kg. After cutting and polishing the finished gemstone weighed only 6.2 kg. Thus 30.8 kg of the original rough stone was lost in the cutting process, equivalent to 83% of the original weight ...
ادامه مطلبWhat is Topaz? Topaz is a rare silicate mineral with a chemical composition of Al 2 SiO 4 (F,OH) 2.It is best known for being these four things: one of the most popular colored stones; number "8" in the Mohs Hardness Scale; a birthstone for the month of November; a gemstone of many colors; Topaz obtains much of its popularity from its beautiful colors and its status as a birthstone.
ادامه مطلبGemstones News: Neelam Stone - The beautiful Blue Sapphire is governed by the powerful Saturn. Saturn is an important planet and is known to have a strong influence on the lives of al
ادامه مطلبOrange topaz is most commonly referred to as "precious topaz.". This variety of topaz is the one most recognized as being the birthstone for the month of November. In addition to being recognized as the official November birthstone, the orange topaz is also recognized by many as being a symbol of friendship and the state gemstone for Utah.
ادامه مطلبThis is a quick video tutorial on how to cut and polish a low hardness gemstone (in this case, Fluorite) using materials that you can find around the home an...
ادامه مطلبBlue topaz consists of aluminium and fluorine. All members of the topaz family have the same mineral composition, it's just their hue that differs. Natural blue topaz is rare and hard to find. This has prompted the production of the stone using a treated, colorless topaz. The process involves heating and irradiating the stone until it's blue.
ادامه مطلبGemstone Type List: Guide to Precious & Semi-Precious Color Gemstones. GemSelect's list of precious & semi-precious gemstones: With over 130 gem varieties, our gemstone index will help you find the perfect colored stone for your jewelry & crystal healing needs.
ادامه مطلبThe first thing you need to do is take a class with the GIA. Education is key when it comes to Gemstone testing.Distance Education costs little to start, it just depends on how far you want to go. As well as taking a course you need to buy this book and treat it as the Gemstone Bible. Gemstone identification made easy by:ANTOINETTE MATLINS, P.G.
ادامه مطلبYellow Topaz possesses a number of metaphysical healing properties that affect a person's life bringing positive changes to it. It is less expensive but has countless benefits for humans. As mentioned earlier, Yellow Topaz is a stone of luck. It brings kismet to your life and turns the things to your favor.
ادامه مطلبFirst off, Topaz is harder than Quartz. Topaz has a Mohs hardness rating of 8, and Quartz is a 7. There are a variety of colors of quartz, known by their common gemstone names, as follows: Rock Crystal - or clear crystal quartz; can have inclusions, such as rutile or tourmaline; the most common type of quartz.
ادامه مطلبMystic topaz was first seen in September of 1998, at the Hong Kong Jewelry Fair, but it took several years before this magnificent marvel hit mainstream consumers. Before mystic topaz is crafted into the vibrant stone that it is; it starts as a natural topaz gemstone. Through a modern technology technique called CVD (chemical vapors disposition) the stone is made more desirable.
ادامه مطلبTopaz Uses and Purposes. Topaz is a stone of love and good fortune, and is highly effective for bringing successful attainment of goals. It is great for attracting the right person into one's life, for friendship, love or business, or to improve existing relationships. It enkindles honesty, faithfulness and trust.
ادامه مطلبTopaz is a fluorosilicate and can contain trace elements that cause different colours within the Topaz. Origin of name: from Greek Topazion, a Red Sea Island often covered in mist. Topaz wasn't really known about before the classical era, in the Middle Ages the name topaz was used to refer to any yellow gemstone.
ادامه مطلبPrimary Test: The main difference between the irradiation and dyefusion is easily seen in the attached images. The dyefusion process leaves the color following the crystal structure of the topaz while the irradiation creates the color around the keel line of the stone. This is …
ادامه مطلبAnswer (1 of 3): Since it is a 7 on the Mohs scale, you can do a simple scratch glass test. That will rule out lesser stones that look like it like agates (amethysts) or quartz (crystal). Most topazes come in a stunning amount of colors and cuts, but since it is a quality stone check the setting ...
ادامه مطلبMany gemstones have been routinely coated to improve or radically change their color for many years now. Topaz is a case in point. "Mystic" topaz, for example has a thin layer of titanium applied to the pavilion which causes interference effects and results in a display of rainbow colors.
ادامه مطلبTopaz, known as the stone of light, comes in many colors; the most valuable being the brilliant golden orange "Imperial Topaz." (Image: Thomas Quine via Flickr CC BY 2.0) The world of gemstones is vibrant and dynamic, with precious stones have long having been considered to have great aesthetic, spiritual, and practical significance.
ادامه مطلبShirley Bassey said diamonds are forever. Marilyn Monroe told us they're a 's best friend. But are diamonds really all they're cracked up to be? Sure, th...
ادامه مطلبSome topaz gemstones are treated with an extremely thin film of mineral or metalic materials and then placed in a vacuum. This process creates topaz that are a wide variety of irridescent, eye catching colors. They are called "Mystic Topaz", and new terms are coined every week. Synthetics
ادامه مطلبLondon blue topaz stone is often use for affordable engagement rings. Blue topaz meaning. 99.99% of natural blue topaz are irradiated. It is very rare to find a non-irradiated natural stone. Topaz is irradiated to enhance, change as well as to deepen its color. This process can take place in an accelerator by electron bombardment.
ادامه مطلبDiscover the 17 practical steps to gemstone identification (even if you're just getting started with gemology) Learn how you can use specific tools to gather data, make observations & arrive at an accurate ID; Explore a range of gemological tests… not only will you get familiar with the process but also time-saving shortcuts!
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