Gemakkelijk

Approved Gemstone Testing Laboratories

Gem Rock Auctions has one of the largest range of Certified Gemstones online. Our goal is to have the most comprehensive and competitive priced range of certified Gemstones. Our Verified sellers can only have gemstones certified by the laboratories listed below. New laboratories can be submitted to our Gemstone Advisory Panel for inclusion to this list. 

Our Gemstone Sheriff program also reviews sellers descriptions to give buyers confidence in our Gemstones. The following table outlines the testing capability of the gemology laboratories used on GemRockAuctions

UNITED STATES OF AMERICA

• American Gem Society Laboratories (AGSL)

• American Gemological Laboratories (AGL)

• Gemological Institute of America (GIA)

• International Gemological Institute (IGI)

• International Gemological Laboratories (IGL)

INDIA

• Advance Gem Research Lab

• Gemmological Institute of India (GII)

• GTL (Gem Testing Labratory)

• International Gem Testing Laboratory Jaipur

• International Gemlogical Labs and Institutes

AUSTRALIA

• Gem Certify

• Gem studies laboratory

• Gemmological Association Of Australia

• Symmetry

• Gem Val

ASIA

• AIGS Laboratory

• Al Ahsan Jewllers and Gemologists

• BGL Bura Gemolical laboratory

• Center For Gem and Jewelry (CGJ) - Sri Lanka

• Ceylon Gem Lab (CGL) - Sri Lanka

• Chanthaburi Gemological Laboratory Co.Ltd

• CIGTL - Pakistan

• Emil Gem Laboratory (Japan)

• Gem Institute of Thailand (GIT)

• Gem Research of Asian (GRA)

• Gem-Gold identification center - Vietnam

• Gemological Consultancy International (GCI)

• Gemological Hallmark International Co ltd

• GFCO

• GGTL - Sri Lanka

• GIC - Gemmological Institute of Colombo

• GRS Thailand

• Himalayan Gem Lab

• IGEC International gemology

• IGE Institutio Gemologico Espanol

• Inter Gem Lab (IGL)

• Gemological International Labratories (GIL)

• Lotus Gemology

• Nan Yang Gemological Institute (NGI)

• Nuclear Gem Lab

• PGTL - Precious Gem Testing Laboratories

• Royal Gem Lab - Sri Lanka

• SGS School Of Gemological Sciences

• SLP Gem Laboratory

• The Gem Institute Kandy Sri Lanka

• Tokyo Gem laboratory

CANADA

• GIL (Gemological International Laboratories Canada)

EUROPE

• Antwerp International Gemological Laboratories (AIG)

• AGTL

• ALGT (Antwerp Laboratory for Gemstone Testing)

• DSEF (deutsche Stiftung Edelstein Forschung)

• European Gemological Laboratory USA (EGL)

• GLA - Gemmological Laboratory Austria

• GLT - Bernhard Thal

• Gübelin Gem Laboratory Ltd. (GGL)

• GPC Netherlands

• GRS Switzerland

• International Gemological Institute (IGI)

• Laboratoire Français de Gemmologie (LFG)

• Swiss Gemmological Institute (SSEF)

SOUTH AMERICA

• Rodrigo Giraldo Gem lab

* Synethic gemstone detection can be extremelydifficult for Quartz (Citrine, Amethyst, Ametrine), Beryl (Aquamarine, Morganite). Advanced equipment must be used which some laboratories may not have.

** Jaedite treatments can be detected by basic equipment, however some treatments require advanced equipment which some laboratories may not have.

*** It is extremly difficult to test for treatment via irradiation. For this reason many reports do not mention irradiation as a treatment, even on commonly treated gemstones like Topaz.

Diamonds

Ruby

Sapphire

Emerald