Jadeite Jade Classification (硬玉翡翠分類)

A seminar about Jadeite Jade classification was held on 29 April 2008 in HKPC which organized by HKIE-Material Division. The speaker (Ms. Bonita Kwok) introduced that JADE (玉) is divided into Fei Cui (翡翠) and Nephrite (軟玉). The different characteristic is show into the following table.



There are 3 common “Jades”. They are Fei Cui (翡翠), Nephrite (軟玉) and Serpentine (蛇紋石).

Use FTIR to analysis Jade composition

In late 2006, The Gemmological Association of Hong Kong released HKSM/JJT-2006 titled ‘Standard methods for testing Fei Cui (jadeite jade) for Hong Kong.
Contents of this standard begins with a precise definition of Fei Cui, its major physical properties, and a tabulation of the various types of Fei Cui (Types A, B, C, and B+C) that are available commercially.

Until now, there are five gemstone testing laboratories who achieved HOKLAS accreditation by HKAS. They are:
No.151 – Asian Gemmological Institute and Laboratory Limited
No.152 – China Gems Laboratory Limited
No.153 – Hong Kong Jade & Stone Laboratory Limited
No.156 – Yang Mulia Gems Limited – Hong Kong Gems Laboratory
No.165 – Jewellery Trade Laboratory Limited