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Four Tools For Gemstone Testing
Cuatro herramientas para la prueba de piedras preciosas
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The 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. & A.C. BONANNO, F.G.A., A.S.A., M.G.A. That is a book nobody should be without especially if you’re considering taking GIA classes.

1 Loupe.

It must have a black housing “Case” not chrome or gold since black casing prevents a distorted view as long as you are using a triplet X10 magnifier. If the Loupe is not Triplet you may as well throw it in the trash. A cheap Loupe which does not show the true Gem, shows a distorted view.

One main thing to memorize is “Gemstone Finger printing”. Most gemstones have their very own fingerprint per gem type. Like Peridot - it has what is called a Lilypad inclusion. Many Ceylon Sapphires have a disc-like inclusion referred to as halos. These are small fractures and they are also seen in Garnets.

Four Tools For Gemstone Testing - Loupe

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2 Dark field Loupe

This is another tool – it will attach to a standard maglite and detects the flash effect in filled Diamonds, Rubies, Sapphires and Emeralds stuffed with resin or epoxy. It will show other internal characteristics in gemstones you need when on the road and cannot test.

Four Tools For Gemstone Testing -Dark Field Loupe

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3. Chelsea Filter

A Chelsea filter is very good to have, its used for testing Gems to confirm what something is not. Chelsea were used to seperate Aquamarine and natural zircon but today there are many synthetics that will pass with this tool. It is not as dependable as it once was but it can be used for other colored Gems like telling the difference in real and synthetic Sapphires, Spinels from Sapphires, Aquamarine, Jade from Jadeite (Many confused Gems).

Four Tools For Gemstone Testing - Chelsea Filter

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4. Dichroscope

A costly mistake can be prevented using this tool correctly. Calcite Dichroscope. Make sure you buy this type and not a Polarizing Dichroscope. A Chelsea Filter and Calcite Dichroscope can help many buyers or sellers distinguish one stone from another. A very small tool – dichroscope will show two small blocks at the end of the tube as looking into a stone and show two different colors. Another issue is the user needs to know what colors to look for.
Four Tools For Gemstone Testing - Dichroscope

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So basically those four tools can help to identify gemstones out in the field.

Lo primero que debe hacer es tomar una clase con el GIA. La educación es clave cuando se trata de pruebas de piedras preciosas. La educación a distancia cuesta poco para comenzar, solo depende de qué tan lejos quiera llegar.

Además de tomar un curso, debe comprar este libro y tratarlo como la Biblia de piedras preciosas. La identificación de piedras preciosas es fácil gracias a: ANTOINETTE MATLINS, PG & AC BONANNO, FGA, ASA, MGA Ese es un libro del que nadie debería quedarse, especialmente si está considerando tomar clases de GIA.

1 lupa.

Debe tener una "carcasa" de carcasa negra, no cromada ni dorada, ya que la carcasa negra evita una vista distorsionada siempre que utilice una lupa triplete X10. Si la lupa no es triplete, también puedes tirarla a la basura. Una lupa barata que no muestra la verdadera gema, muestra una vista distorsionada.

Una cosa importante para memorizar es "Gemstone Finger printing". La mayoría de las piedras preciosas tienen su propia huella digital por tipo de gema. Al igual que Peridot, tiene lo que se llama una inclusión de Lilypad. Muchos zafiros de Ceilán tienen una inclusión de disco denominada halos. Estas son pequeñas fracturas y también se ven en Granates.

Cuatro herramientas para la prueba de piedras preciosas - Lupa

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2 lupa de campo oscuro

Esta es otra herramienta: se adherirá a un maglita estándar y detectará el efecto de flash en diamantes, rubíes, zafiros y esmeraldas rellenos rellenos de resina o epoxi. Mostrará otras características internas en las piedras preciosas que necesita cuando está en el camino y no puede probar.

Cuatro herramientas para la prueba de piedras preciosas: lupa de campo oscuro

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3. Filtro Chelsea

Es muy bueno tener un filtro Chelsea, se usa para probar Gems para confirmar lo que no es. Chelsea se usó para separar la aguamarina y el circón natural, pero hoy en día hay muchos sintéticos que pasarán con esta herramienta. No es tan confiable como lo era antes, pero se puede usar para otras gemas de colores, como diferenciar en zafiros reales y sintéticos, espinelas de zafiros, aguamarina , jade de jadeíta (muchas gemas confundidas).

Cuatro herramientas para la prueba de piedras preciosas: filtro Chelsea

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4. Dicroscopio

Se puede evitar un error costoso usando esta herramienta correctamente. Dicroscopio de Calcita. Asegúrese de comprar este tipo y no un dicroscopio polarizador. Un filtro Chelsea y un dicroscopio de calcita pueden ayudar a muchos compradores o vendedores a distinguir una piedra de otra. Una herramienta muy pequeña: el dicroscopio mostrará dos bloques pequeños en el extremo del tubo como si se mirara una piedra y mostrara dos colores diferentes. Otro problema es que el usuario necesita saber qué colores buscar.
Cuatro herramientas para la prueba de piedras preciosas: dicroscopio

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Básicamente, esas cuatro herramientas pueden ayudar a identificar piedras preciosas en el campo.

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Comentarios

Mineralhunter

nice article, but i would ask , when you are in a market , is not better to use only refractomer portable and a dark field loupe? with these 2 tools you can easly know the type of gemstone( except diamonds, zircon,sphene) and you can watch the inclusions it s not necessary to have other tools .....
I would ask a question, how does a polariscope portable, funtcion?

14th Aug 2018
Dustyg1

There are a lot of gemology schools besides GIA. There are smaller but very good schools in smaller and larger colleges and universities, and there are other good gemology schools. The ISG has a well respected diploma for about $1,500. Google the words - Free Gemology - and you will get many sites, Barbara Smigel has a nice Intro to Gemology for free, and Gemologyonline com is quite good. Like Jovial1 said, the program called Gemology Tools for about $70 is very worth it, tons of information, even quizzes, you can learn a lot form it. You can study the free courses and sites and learn a lot, you can also take courses and get a certificate, or diploma.

1st Oct 2017
Jovial1

Another handy tool is a decent long wave UV light. The light will cause most synthetic corundum to glow orangy red, and it will cause a good quality Burmese ruby to glow a nice pinky red.  The light can also help to identify many other stones too.
  The best advice here is education, education and more education. With so many different gemstones, the book will be your best collecting partner.  I highly recommend purchasing a copy of Gem Tools Professional software once you are comfortable using your identification tools. Invest in quality tools the first time… or be like me and flunk your gem course until you buy decent tools. :-)  I now have great tools in the shop and a set for the field.

22nd Aug 2017
Admin2

Hi Mason2912, if the 2 frames are filled with different colors it cannot be glass because having 2 frames with different colors indicates a DR gemstone where glass is SR

29th Mar 2017
Mason2912

If the 2 frame in dichroscope are filled with the color of the stone your looking at, does that mean its trulely that type your looking at? Or could it be colored glass?

29th Mar 2017
Gemgirl59

Thanks for that tip…..I bought those tools a while back, so now I can put them to good use!

5th May 2016

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