Gem Identification

GEM 240

Course Description

Identify more than 60 species of gemstones, distinguish natural gems from synthetics, and detect gem treatments. Practice testing procedures and techniques on stones. Learn the tools of the trade and how they help reveal gem properties essential to identification. Study the latest gem treatments, and how illumination techniques can facilitate the identification process. Learn how to use gemological laboratory services and gem identification skills to protect your business from costly mistakes. Final exam is open book and proctored; see the Education Catalog for details.

To complete this course, you must have access to gem tweezers (non-locking), a daylight-equivalent light source, a mini Maglite or similar (incandescent), a gemological binocular microscope minimum 10x and 30x (darkfield illumination), a gem cloth, a refractometer with removable magnification piece, white light source and polarizing filter, refractive index (RI) liquid 1.81, an optic figure sphere, a dichroscope, a polariscope, and a spectroscope. These instruments are not included with the course materials. Distance Education students can purchase an instrument package through the GIA Store. (You can also use these tools in a Student Workroom; please refer to the Education Catalog).

During this course, you may come into contact with chemicals, so if you are pregnant, have certain medical conditions, or have allergies, you should contact your physician for advice. Be sure to read the Chemical Safety Disclosure. For more information, contact the Dean of Students at 760 603 4165.

What You Earn

  • Gem Identification Certificate