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About GUILD

Founded in 1980 in Los Angeles, United States, GUILD Gem Laboratories is one of the world's top gemological laboratories in the identification, grading, origin determination, treatment detection and other aspects of colored gemstones. With a wealth of experience and a comprehensive database in firsthand field research, deep academic knowledge backs up every report from GUILD, whose  comprehensive database covers all the important gemstone varieties in the market. From its start-up gemstone identification institute to its authoritative brand based in the Asia-Pacific region and radiating around the world, GUILD Gem Laboratories radiates at a frequency of excellence within the international colored gemstone industry and is defined by professionalism, experience, science and innovation. Currently, GUILD has branches in Los Angeles, Shenzhen, Guangzhou, Zhuji (Pearl City) and Bangkok, to provide professional gemstone identification services for domestic and foreign practitioners.

  • 50
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    Gemstone Varieties
  • 1W
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    Gemstone Samples
  • 60
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    Minefields Investigation
History
  • 2024.01
    In January 2024, GUILD proudly launched its exclusive "Token of Love" report for rubies and sapphires. This report goes beyond mere presentation of authentic gemstone testing data; it precisely targets emotional consumption scenarios and integrates the need for emotional expression. It is not only an authoritative assessment of gemstone quality but also a profound commemoration of precious emotions, emphasizing the emotional value and cultural attributes of gemstones.
    2024.01
  • 2023.10
    In October 2023, Charles Carmona, the founder of GUILD Gem Lab, received the Lifetime Achievement Award from the American Society of Appraisers in recognition of his outstanding achievements over 40 years in various fields such as colored gemstone research, testing, and education worldwide, as well as GUILD's exceptional contributions to the Asian market.
    2023.10
  • 2022.09
    In September 2022, the first Guild Aurora International Gem and Jewelry Competition was held. The competition has been hailed by the industry as one of the top three jewelry events globally. The inaugural event in 2022 reached over 2 million people and surpassed 20 million in total exposure, attracting significant attention from the international jewelry industry.
    2022.09
  • 2021.12
    In December 2021, GUILD premiered the "2021 China Colored Gemstone Market Report" globally. This report is a masterpiece of multidimensional analysis and practical market validation, based on detection data randomly selected from 10,000 gemstones each from the five major categories of rubies, sapphires, emeralds, spinels, and aquamarines tested by the GUILD research team during that year. To this day, the annual colored gemstone market report and pearl market report have become essential guides for practitioners in the industry.
    2021.12
  • 2021.06
    In June 2021, GUILD released the "GUILD Pearl Identification and Grading Standards" and the "GUILD Pearl Testing Report," focusing on the research, identification, and education of all categories and color ranges of pearls. These efforts have contributed to the establishment of a standardized system in the pearl market. GUILD has successively introduced trade names to enhance market understanding of various pearl categories, continuously refining its standards in line with market developments. As such, GUILD is both a direct participant and a witness to the golden age of the pearl market.
    2021.06
  • 2017.09
    In September 2017, GUILD introduced the groundbreaking trade name "Verdant Green" for emeralds, establishing an aesthetic trend that prioritizes quality over origin. This has led to widespread recognition and praise globally, as high-quality emeralds are no longer solely evaluated based on their place of origin. With the thriving global colored gemstone industry, GUILD has continuously developed comprehensive identification standards for various gemstone categories, including emeralds, rubies, sapphires, opals, spinels, aquamarines, morganites, and tsavorites, through extensive field research and standard sample analysis.
    2017.09
  • 1998
    Charles Carmona, the founder and Chief Gemologist of GUILD Gem Lab, published the book "The Complete Handbook for Gemstone Weight Estimation," which has become an essential guide for professional colored gemstone buyers. This publication demonstrates GUILD's unwavering commitment to continuous exploration in the field of colored gemstones.
    1998
  • 1985
    Since 1985, GUILD Gem Lab has been a founding member of the International Colored Gemstone Association (ICA) and attended the inaugural ICA annual conference. In February 2023, Ruby Liu, President of GUILD, and Andrew Lucas, Senior Vice President of GUILD, delivered a speech titled "The Development of the Chinese Colored Gemstone Market" at the ICA annual conference.
    1985
  • 1980
    In April 1980, GUILD Gem Lab was established in Los Angeles, USA. GUILD is an international gemstone laboratory that provides services such as gemstone identification, grading, origin determination, and enhanced treatment detection. To this day, GUILD has laboratories in the United States (Los Angeles), China (Shenzhen, Guangzhou, Zhuji), Thailand (Bangkok), Sri Lanka (Beruwala), and other locations. With a professional, scientific, and innovative spirit, GUILD offers clients professional and reliable testing services.
    1980
  • 2024.01
  • 2023.10
  • 2022.09
  • 2021.12
  • 2021.06
  • 2017.09
  • 1998
  • 1985
  • 1980
Merit and senility
 
Number：0755-82323565
Email：leo.hu@guildgemlab.com
Address：Room 3C08, Addcon Building, Shuibei 1st Road, Luohu District, Shenzhen, Guangdong Province, China

Cpyright © 2023 GUILD宝石实验室 粤ICP备粤ICP备16082724号-1号

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