ABGM - Associação Brasileira de Gemologia e Mineralogia

AGES - Associação Gemológica do Espírito Santo 

AIGM - Associação Interamericana de Gemologia e Mineralogia

American Gem Society

American Society of Appraisers

CGL: Swiss Canadian Gemlab

CIGEM: Canadian Institute of Gemmology

DGEM - Deutsche Gemmologische Gesellschaft eV (German Gemmological Association)

DGL - Delhi Gem & Jewellery Institute

EGL - European Gemological Laboratory and College og Gemology

EGL - European Gemological Laboratory and College og Gemology - India

EGL - European Gemological Laboratory and College og Gemology - South Africa

Far East Gemological Institute

GAA -  Gemmological Association of Australia

GEM-A - The Gemmological Association of Great Britain

Gemmologia Italiana

Gemmologists Association of Sri Lanka

GGI - Global Gemological Institute

GIA - Gemological Institute of America

GII - Gemmological Institute of India

GISA - Gemmology Institute of Southern Africa

HK - H.K. Institute of Gemmology

HRD Antwerp - Institute of Gemmology

IBGM - Instituto Brasileiro de Gemas e Metais

IGARM - http://igarm.com.mx/

IGI - Istituto Gemmologico Italiano

IIG - Insurance Institute of Gemology

IGE - Instituto Gemológico Español

IGL&I: http://www.igli.in/index.htm

IGN - Istituto Gemmologico Nazionale

IGP -  Instituto Gemológico Português

ING - Institut National de Gemmologie

NGI - Nan Yang Gemological Institute

PGI - Pune Gemological Institute

SBG - Société Belge de Gemmologie

The Scottish Gemmological Association