Gemological Websites:

  • jewelryandrelatedarts.com

    Adornment // The Magazine of Jewelry & Related Arts

    The magazine for people who love antique, period, costume, studio, fashion, collectible jewelry and the study of jewelry history.

  • ogdir.com

    Ogdir Home

    CARAT Professional Jewelry Appraisal Software for Jewelry trade.

  • cigem.ca

    Gemology World – Canadian Institute of Gemmology

    Dedicated to research and advance in education in the field of gemmology. Gemlab Research & Technology. Gemological Books and Instruments. Professional Development.