Gemologists
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Blue Sapphire
Sapphire occurs in metamorphic rocks, lavas and pegmatites however production is mostly from placer gravels.
GEMOLOGIST, GRADUATE:
Graduate Gemologist is the designation given to a person who has successfully completed GIA's Graduate Diamonds diploma program and GIA's Graduate Colored Stones diploma program.
A gemologist is one who studies gemstone identification and grading. A good gemologist is not necessarily a good appraiser. But a good appraiser must be a good gemologists. How can this be?
Tools used by Gemologists
While some gemstones are readily identified on sight, even by novices, many of them are quite similar in appearance and cannot reliably be identified on visual appearance alone.
Gemologist
A person who has successfully completed recognized courses in gemology and has proven skills in identifying and evaluating gem materials.
Gemologist: A specialist in gem materials. One who has successfully completed the study of gem identification, grading and pricing. Most common, Graduate Gemologist, who is certified by the GIA.
Gemologists put all colored stones together into one category and all diamonds into a separate one--> regardless of their color! ...
Gemologist
A person with expertise in gemology is known as gemologist. There are many recognized courses available from various Gemological Institutes which offer study in gem identification, grading and pricing.
Gemologist - One who has successfully completed recognized courses of study in gem identification, grading and pricing, as well as diamond grading and appraising; e.g.
Gemologists recognize two broad categories of quartz, coarsely crystalline and finely (or crypto-, meaning hidden) crystalline.
Gemologist
A person which are specialized in the science of gemstones.
Gemology
Science of gemstones, come from the Latin word gemma=gemstones and the Greek word logos science or teaching ...
Gemologists can agree that CZ comes closer than any other gem material to matching the characteristics of a diamond-it's uncanny.
Gemologists can detect the presence of fillers when a stone is examined under a microscope. But it's nearly impossible to identify the agent without the aid of very expensive equipment that only a handful of labs in the world can afford.
Gemologist
A person who has completed studies in DIAMONDS, COLORED STONES and GEM IDENTIFICATION. He or she should have sufficient experience in the jewelry business to properly apply these studies to appraisals.
Girdle ...
Gemologist/Appraiser: usually an employed position, some options for independent service work. Training and equipment costs can be high. Diamonds are a specialized sub-section of gemology.
Gemologists use the term natural gems for gems formed in the earth. Whenever a man-made process is used to simulate the natural conditions and create an identical product, the gemstone is called lab created.
Gemologists agree that the best cut diamonds are those that follow a set of formulae calculated to maximize brilliance.
A gemologist and the author of the famous book: "Pearl Buying Guide: How to Evaluate, Identify, and Select Pearls & Pearl Jewelry." It provides many distinctive photos and clear explanations.
Rhodoid ...
Some gemologists believe the best round or near-round freshwater cultured pearls are indistinguishable from the finest white Akoya cultured pearls. The freshwater pearls sell for much less.
As a gemologist—she’s an FGA (elected to the Fellowship of the Gemmological Association of Great Britain)—enjoys gem testing and photomicrography.
Gemologist
An individual who is qualified to study gemstones through evaluation and identification.
Trained gemologists grade the clarity of a diamond by examining it top-down with the use of a 10x magnifying microscope and looking at the diamond from the top down.
Graduate Gemologist Diploma received from the Deutsche Gemmologische Gesselschaft in residence at Idar-Oberstein, Germany Graduate Gemologist Diploma received from the Gemological Institute of America in residence at Santa Monica.
Graduate Gemologists On Staff To Assist You
Gemological Institute of America
Jewelry & Watches ...
A trained gemologist will easily be able to distinguish a natural diamond from a synthetic CZ diamond, but there are visual differences that can be detected with the untrained eye.
The English gemologist G-F Herbert Smith, writing twenty years later, includes among the precious gems diamond, ruby, sapphire, and all forms of beryl (emerald, aquamarine, morganite), excluding all others.14 Other writers have made different lists.
Gemmologist, Gemologist
A person with expertise in gemmology, a gemstone expert. There are formal qualifications, such as F.G.A. (Fellow of the Gemmological Association) in the UK.
Gemstone ...
Kunz, the gemologist for Tiffany & Co., presentedmany different and unusual gems which were mined in the U.S.A.
Today, trained gemologists can generally also distinguish between natural diamonds and synthetic diamonds.
Robert Borneman, Gemologist
Insurance companies rely on appraisals from independent jewelry professionals to establish the replacement value of an item. This value is the basis from which the proper insurance premium is calculated.
Gemologists agree that Cubic Zirconia is the finest diamond simulation because it comes closer than any other gem material to the characteristics of a diamond.
polariscope - A gemologist's tool that generates a polarized light field for the viewing of gemstones. Viewing gems through polarized light may be used to distinguish one gem from another.
Unlike most gemstones, flaws (called inclusions by gemologists )are quite common in emeralds, so they lower the value much less than with other precious stones such a diamonds. The most highly prized emeralds are mined in Columbia.
But flaws (called inclusions by gemologists )are quite common in emeralds, so they lower the value much less than with other precious stones such a diamonds. The most highly prized emeralds are mined in Columbia.
In fact, gemologists use these flaws, known as "jardin" or garden, as evidence of the gem's authenticity. The gem's center should be as flawless as possible, however. Many stones are treated to mask the natural imperfections. Emeralds rate a solid 7.
Does the store have a trained gemologist and a bench jeweler on the premises? Gemologists have studied the unique properties of diamonds and colored stones.
A person studying in this discipline is a gemologist. gemstone Any mineral or naturally occurring substance in an raw, uncut state that is capable of being a gem.
I am a gem cutter and gemologist living in the far north of California and been working on a site to showcase and market my hand-cut gemstones and I must say that I can only hope that my site is as well thought out, ...
We are in the enviable position of being first in line in the channel of distribution and our GIA qualified gemologists hand pick out the very best for sale in our private collection which is world renowned for the quality of the Tanzanite we sell.
The metric system is the standard used in the jewelry industry, by gemologists, and by science worldwide. For more information, consult our metric conversion information.
For some the sixties swung, for gemologists they rocked. The decade which had most people looking to the sky for Lucy’s diamonds had gemologists transfixed by a myriad of precious gemstones hailing from Africa’ ...
Don't be fooled by official-looking certificates from local "certified gemologist" gem labs. They are probably owned by the store and exaggerate the grades to make the prices look good.
As in the case of color-grading with standardized light source or with the help of a color measuring apparatus, the gemologist and diamond specialist. when grading for clarity.
Each year they have to re-test to maintain their certification as a Registered Jeweler, Certified Gemologist or Certified Gemologist Appraiser
To have consistent business practices.
For a round diamond, gemologists calculate table percentage by dividing the diameter of the table, ...
George Frederick Kunz, one of the great gemologists of his day, repudiated the new list vehemently in his book, "The Curious Lore of Precious Stones", going so far as to outline the DANGERS of playing with this list.
It takes a professional Diamontologist or Gemologist to see the tiny characteristics, almost invisible traits like: Naturals, Internal Graining, Extra Facets, Polish Marks. and even then, they will have to scrutinize the stone very well.
George Kunz, the legendary Tiffany's gemologist suspected trickery. He dispatched a colleague to Siam (now Thailand) and learned that a very large deposit of brown zircon had recently been discovered.
While natural colored diamonds are quite expensive, gemologists have developed new ways to create versions that are affordable for the average person. They do this by treating the less desirable diamonds with irradiation followed by intense heat.
New York was established with the most innovative concept of Harry Winson, the well-admired gemologist. He excavated most famed rough category diamonds including 726.60 carat of Vargas and 970 carat of Sierra Leone.
Altobelli is an award winning gemologist and appraiser. He has been in business 60 years at his fine jewelry store in North Hollywood, California.
The photo below shows a master set used by gemologists to grade color in diamonds. Each diamond to be graded is compared to the master set to determine where it should fall on the diamond color scale.
Gemologists use low, medium and high temperatures in furnaces to alter gemstone color, clarity and phenomena. Nearly all of the world's ruby, sapphire and tanzanite owe their color and clarity to heating.
Legend: Mawsitsit was first identified by Swiss Gemologist, Eduard Gubelin in 1963. The famous gemologist was traveling in Burma and noticed a bright green rock with black inclusions being mined.
Determining if a sapphire has been heated is normally a simple task done by a trained gemologist who is familiar with inclusions within sapphires. When sapphires are heated at high temperatures the internal inclusions change drastically.
Master gemologist George Kunz of Tiffany was a fan of alexandrite and the company produced rings featuring fine alexandrite in the late nineteenth and early twentieth century, including some set in platinum in the twenties.
It is one of six species recognized by gemologists. The dominant hue is red, but the overall color may be modified by a little violet. Chemically it is an iron-aluminum silicate, but is rarely pure in nature.
Gemologists can create fancy color diamonds by manipulating less desirable diamonds to alter their colors. Irradiation, followed by a high heat treatment, can turn brownish and pale yellow diamonds into richly colored, affordable gems.
The gradations in color can only be seen by an expert gemologist. The grades G-H are called near colorless and the difference can be seen by a casual observer only when compared to a higher-grade diamond.
E: Colorless. Only minute traces of color can be detected by an expert gemologist. A rare diamond.
F: Colorless. Slight color detected by an expert gemologist, but still considered a "colorless" grade. A high-quality diamond.
 See also: Stone, Jewel, Color, Gemstone, Jewelry
  
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