Rapaport Magazine
Global Guide to Gemological Laboratories


Diamond grades, country of origin, synthetics and gemstone enhancements are all crucial issues affecting the quality of gems and jewelry. The industry depends on gemological laboratories to supply — and verify — important information about diamonds and gemstones. On the following pages, you’ll find an international directory of some of the most influential labs around the world. The laboratories included in this guide are
those that responded to an invitation from Rapaport Magazine to submit information on their operations.

Key to Abbreviations —
Chemical Vapor Deposition
EDS: Energy Dispersive Spectrometry
EDXRF: Energy Dispersive X-ray Fluorescence
EDXFA: Energy Dispersive X-ray Fluorescence Analysis
FTIR: Fourier Transform Infrared
HPHT: High Pressure-High Temperature

LA-ICP-MS: Laser Ablation Inductively Coupled Plasma Mass
LIBS: Laser Induced Breakdown
SEM: Scanning Electron Microscope
UV-Vis: Untraviolet Visible
UV-Vis-IR: Ultraviolet Visible Infrared
UV-Vis-NIR: Ultraviolet Visible Near Infrared
XRD: X-ray Diffraction
XRF: X-ray Fluorescence

Rapaport Magazine does not endorse nor recommend any of the gemological laboratories in this directory. To the best of our knowledge, these labs are each accredited in their country. Rapaport-affiliated companies represent AGS and GIA Laboratory services in Israel, India and Belgium.

Article from the Rapaport Magazine - November 2012. To subscribe click here.

© Copyright 1978-2021 by Rapaport USA Inc. All rights reserved. Index®, RapNet®, Rapaport®, PriceGrid™, Diamonds.Net™, and JNS®; are registered TradeMarks.
While the information presented is from sources we believe reliable, we do not guarantee the accuracy or validity of any information presented by Rapaport or the views expressed by users of our internet service.