GIA ORANGE COUNTY ALUMNI CHAPTER PRESENTS:

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Charles Carmona is President of Guild Laboratories, Inc. (www.guildlabs.com), which he established in Los Angeles in 1980. He is a professional gemologist/appraiser/consultant, working with international and national government agencies, attorneys, accountants, insurance companies, the jewelry trade and the public. He is the author of The Complete Handbook for Gemstone Weight Estimation, published in 1998, a top-selling jeweler’s guide and standard reference for the industry. He has also authored articles for Gems & Gemology and numerous trade journals.

He will give a presentation on the most common stones found in Australia, focusing on the gemological origins and mining localities of boulder, white and black opals, sapphires, Argyle diamonds and cultured pearls.