RGA for Professionals

The ISG Registered Gemologist Appraiser for Professionals is designed for those who have earned gemological diplomas from other accepted schools. It is composed of four courses: Introduction to Watches, Created and Treated Gemstones, Personal Property Appraisal and Evaluating Damage Jewelry. The Introduction to Watches and Created and Treated Gemstones courses are intended to bring your gemology education up to the level required for our Registered Gemologist Appraiser program. The Personal Property Appraisal and Evaluating Damaged Jewelry courses are unique in the industry and are required of all RGA candidates.

To earn your ISG Registered Gemologist Appraiser Diploma you must complete the following courses and practical program:

Program Requirements

This program requires the student to have completed a recognized gemological education from a recognized institute or school as listed below:

  • Canadian Institute of Gemmology
  • Asian Institute of Gemological Sciences
  • Texas Institute of Jewelry Technology
  • Gemmological Association of Great Britain
  • Australian Gemmological Association
  • Canadian Gemmological Association
  • American Gem Society
  • Gemological Institute of America
  • For other accepted schools or institutes please contact the ISG office.

Courses are delivered online through HTML5 mobile friendly and responsive presentation to allow you to study via any format, and via PDF Adobe Reader files. There are no other books or other materials required. Gemological equipment is required to complete the practical exercises.

Introduction to Watches

Course: ISG105
Lessons: 6

Created and Treated Gemstones

Course: ISG104
Lessons: 14

Course is being migrated. Available April 4.

Evaluating Damaged Jewelry

Course: ISG108
Lessons: 8

Course is being migrated. Available April 8

Personal Property Appraisal

Course: ISG107
Lessons: 16

RGA Program Practicals Module

To complete your RGA program you will be sent the following gemstone practical package for hand's-on practice and evaluation.

The ISG Practicals Module puts diamonds, pearls and a variety of colored gemstones in your hands to practice your skills, right in your own home. No need to make expensive and time consuming trips to take your practical like other schools. With our Classroom-At-Home program we send the gemstones, diamonds and pearls to you in a single complete package for grading and evaluation once you have completed all courses in gemology and jewelry appraisal for your RGA.  We will grade your work and help you become the finest gemologist/appraiser possible at the world’s lowest cost.

Gemological equipment is required to complete the practical, although the specific equipment needed will be at the discretion of the student. International Students may be required to place a US$800.00 security deposit before shipment.

Gem Equipment Required

Here is a list of gemological equipment you will need to complete the practicals section of the RGA Program.

The ISG Registered Gemologist Appraiser Program Practicals Module will require you to either own, or have access to, a minimum level of gemology testing equipment. These tools are crucial to your being able to complete the hands-on section of the program. Here is a list of equipment you will need. The items shown above can be purchased through GemologyEquipment.com website at discount prices for ISG Students only.

Required Equipment:

  • Polariscope with conoscope,
  • Refractometer, RI Liquid,
  • Diffraction Grating Spectroscope,
  • Calcite Dichroscope,
  • 10x Jeweler’s Louple
  • MM Gauge
  • Gemstone holder/tweezer

Exams, Certificates and Diplomas

Here is the information on how you complete the RGA program.

Certificates and Diplomas: A Certificate of Completion is awarded to the student after successful completion of each course. The Registered Gemologist and Registered Gemologist Appraiser diplomas are awarded after completing all courses, final exams, and practical exams. Final exam includes online written exam and a practical gem identification exam sent to you for completion and return to the ISG office.

Final Exams: 

  • Final Written Exam: A 90 minute timed online Theory Final Exam of 100 multiple choice and true/false questions with a required passing grade of 70% covering all course materials. Then, a
  • Final Practical Exam: a 20 stone Practical Final Exam will be sent to you to test your gemological ability to identify gemstones. International students will be required to place a refundable US$800.00 deposit with the ISG office when requesting practicals. One deposit will cover all practicals.