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Gemology

 F. Oya Borahan, G.G.,  D.G.A., F.G.A.

GIA, DGemG, GemA 

Gemological Institute of America, German Gemological Association, Gemological Association of Great Britain

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Gemology is the identification and grading of gemstones and also the scientific study of their formation, origin and chemical and physical properties. 

It covers also the examination of the synthetics, the imitations and enhancement of gemstones.

www.gia.edu

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Garnet group

Natural-synthetic emerald

Is it diamond or moissanite?

Diamond and simulants

Beautiful inclusions and structural properties

Constructed stones; doublets and triplets

Gemstones of Turkey

 

Courses and events

My opinions of the three gemological schools from which I received my education and my experiences.

My credentials

 

Minilab  

 

 

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German Gemmological Ass.
http://www.dgemg.com

 

 

Gemmological Association of Great Britain

 www.gem-a.info

 

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Montreal Gem and Mineral Club

www.montrealgemmineralclub.ca

 

 

 Natural gemstones

Garnet group

 

Natural-synthetic emerald

Is it diamond or moissanite?

Diamond and simulants

                              

 Doublets and Triplets

Beautiful inclusions and structural properties

Enhanced gemstones