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Gemstone

en.wikipedia.org/wiki/Gemstone

A gemstone or gem is a piece of mineral crystal, which, in cut and polished form, is used to .... Each laboratory has its own methodology to evaluate gemstones. ... Even the same gemstone can occur ...

How to Buy Sapphire: 15 Steps (with Pictures) - wikiHow

www.wikihow.com/Buy-Sapphire

When buying sapphire, you should know how to evaluate the quality of the stone to ... While blue is the most common color for a sapphire, these gemstones also ...

Colored Gem Evaluation - Emporia State University

academic.emporia.edu/abersusa/go340/evaluate.htm

Diamond, ruby, sapphire, emerald, and topaz are all central to a jeweler's ... Unfortunately, there is a paradox with evaluating colored stones in that often times ...

How to Evaluate the Quality of Sapphire Gemstones - Jewelry Notes

www.jewelrynotes.com/sapphire-gemstone-shopping-quality/

Sapphire Color. Look for sapphires whose color is intense and deep. If the stone is too dark or too light, or if the color is muddy and resembles ink, then the ...

How to grade and value a gemstone - Wild Fish Gems

www.wildfishgems.com/grading

How to evaluate colored gemstones: ... the padparadscha, the rhodolite or cornflower blue sapphire which are characterized by the combination of hue and tint.

Sapphire Education - The Natural Sapphire Company

www.thenaturalsapphirecompany.com/t-education_sapphires/

Colors. Sapphires come in all ranges of colors from blue to black to colorless and all .... The second consideration in evaluating a blue sapphire is sheer beauty.

How to Evaluate Sapphires | eHow

www.ehow.com/how_4441288_evaluate-sapphires.html

How to Evaluate Sapphires. Sapphires come in a wide range of beautiful colors. Most people think of this lovely gemstone as being a deep blue color, but ...

Pink Sapphires | A Guide On Judging Color In Pink Sapphires

www.thenaturalsapphirecompany.com/education/sapphire-colors-varieties/pink-sapphires/

In today's market, the most coveted pink sapphire colors are saturated purplish ... professional laboratories have been known to disagree when evaluating the ...

Faceting Rough - How to evaluate and select it

facetingacademy.com/learn-faceting/learn-faceting-free/rough-class/

Too Dark; Bad Dichroism, or a Closed C-axis; Bad Color Modifiers ... In stones that have directional color (Sunstone, Iolite, Sapphire, ...

Passion Fruit: A Lover's Guide to Sapphire — Palagems

www.palagems.com/sapphire-connoisseurship/

This is the color – an intense azure hue matched in the world of gems only by the finest ... This is, of course, apropos in the evaluation of any gem, but of utmost ...

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Ruby & Sapphire | Judging Quality & Prices

www.ruby-sapphire.com

The dispersion of corundum is so low (0.028) and the masking effect of the rich body color so high, that it is generally not a factor in ruby and sapphire evaluation  ...

COLORED STONES - Gemological Institute of America

www4.gia.edu

Although pink sapphire, tourmaline, garnet, and spinel can all look similar, each gem ... you'll learn how to evaluate colored stones quickly and accurately. Later,.

Sapphire Buying Guide - International Gem Society

www.gemsociety.org

Before you embark on a sapphire buying adventure, learn how to evaluate a ... Top blue sapphire color consists of a hue of violet-blue or blue, a medium to deep ...