Identifying HPHT-treated Natural Type Ha Colourless Diamonds and CVD Synthetic Diamonds

摘要

Since November 2012, a series of Application Notes have been posted on the M&A Gemological Instruments website at www.gemmoraman.com/articles.aspx . These cover various topics, including the use of a Raman spectrometer forseparatingheatedfromunheatedspinel,identifyingthe colour origin of cultured freshwater pearls, red coral and conch pearls, and detecting resin-impregnated jadeite. Most recently (in September 2013 and January 2014), Application Notes were posted on two important diamond topics.