Sign up for our newsletters
Welcome to Global Gem Testing Laboratory

Global Gem Testing Laboratory Co., Ltd (GGT) is a private, independent gemological laboratory. We provide reliable and accurate gemological testing services. Our quality reports are certified by experienced professional gemologists.

GGT Service

- Distinguishing natural, synthetic and imitation gemstones.
- Analyzing the enhancement in gemstones.
- Distinguishing natural diamond and diamond simulant.
- Analyzing gemstones by advanced instruments.
- Grading diamond clarity and color.
 
TRANSPARENT RHODONITE WITH UNUSUAL INCLUSIONS

Most Rhodonite seen in the trade are translucent to opaque pink, often with black veins or spots. Many are fashioned into beads and cabochons. However, transparent Rhodonite is also found in some localities

INTERESTING INCLUSIONS IN QUARTZ CRYSTAL

Recently, we have received the special quartz crystal from Mr. Anwar Afghan. This quartz weight 21.53 cts. and has a double terminated crystal shape. It was said to originate from Himalaya Mountain in Pakistan-Afghanistan area

JADEITE CLASSIFICATION AND IDENTIFICATION

For standard gemological testing, jadeite commonly shows refractive index 1.66 spot reading and specific gravity 3.34 (may be considerably lower due to albite content). To classify jadeite type, advanced instrument – FTIR spectrometer is required. As a polymer is an organic compound that FTIR is able to detect.




 
Rhodolite Garnet



Synthetic bi-colored quartz



Dyed Quartz



Synthetic Ruby (flux)



  Company Profile   GGT Service   Lab Research   Links
Copyright 2009 GGT LABORATORY , All right reserved
Engine by MAKEWEBEASY