Jewelry,
Gem & Gemology Acronyms
Our
industry is full of acronyms referring to organizations, synthetic
gem materials, and characteristics of stones. Below is a list
of common acronyms and their definitions. We are hoping this
will help sort out the mystery and shed some light on the
secret language used within the esoteric cult of
jewelers and gemologists.
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AA-CJI
- Accredited Appraiser of the Canadian
Jewellers Institute
ADR : Anamolous Double Refraction
AG (CIG), Accredited Gemmologist from
the Canadian Institute of Gemmology
AGG = Aggregate
AGS: The American
Gem Society
AGSL:
The AGS Laboratory for
Gem Testing
AGTA
= American Gem Trade Association
AIGS
= Asian Institute of Gemological Sciences
AM
- Accredited Member of the American
Society of Appraisers
ASA
- Accredited Senior Appraiser of the
American Society of Appraisers
B-/+ = Biaxial negative/positive
Be-heated,
Be-treated = Beryllium treated sapphire
BR: Birefringence
ca: Critical angle
Cab: en-cabochon cut
stone
CAPP
- Certified Appraiser of Personal Property
CGA
- Certified Gemologist Appraiser
CIBJO
- Confédération
International de la Bijouterie, Joaillerie, Orfèvrerie
des Diamantes, Perles et Pierres
CMA
- Certified Master Appraiser
CRI = Color Rendering
Index
CSM - Certified Senior Member of the
National Association of Jewelry Appraisers
ct
- carat (gemstone weight)
CZ - Cubic
Zirconia
DGemG:
Graduate of the Deutsche Gemmologische Gesselshaft
DR:
Double Refraction
EGL:
European
Gem Lab
FCC
= Federal Communications Commission
FCGmA - Fellow of the
Canadian Gemmological Association
FGA:
Fellows of the Gemmological Association of Great Britain
FGAA - Fellow of the
Gemmological Association of Australia
FGG:Fellows
of the Deutsche Gemmologische Gesselschaft
FTC
= Federal Trade Commission
GG - Graduate Gemologist. Awarded
by the Gemological Institute of America
G&G - Gems &
Gemology (GIA's trade journal)
G & J: Gems &
jewellery (Gem-A periodical)
GGG:
Gadolinium Gallium Garnet
GIA:
The
Gemological Institute of America
GTL
- GIA's Gem Trade Laboratory
HPHT:High
Pressure High Temperature treatment for diamonds
HSN = Home Shopping Network
ISA
- International Society of Appraisers
Accredited Member
J
of G: The Journal of Gemmology (Gem
-A periodical)
JA:
Jewelers
of America
JTV
= JewelryTelevision
JVC:
The
Jewelers Vigilance
Committee
kt - karat (metal purity)
MGA - Master
Gemologist Appraiser
RI:
Refractive Index
SG:
Specific
Gravity
SRB - standard round
brilliant (variant of RB)
TIR
- Total
Internal Reflection
U-/+
= Uniaxial
negative/positive
YAG - Yttrium Aluminium
Garnet
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The following books are my recommendations for further study.
They are some of the best available.
If you would like a larger selection, please visit the Book
Shop.
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