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Real World Gem Testing

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One of the best gemstone books, Joel Arem's Color Encyclopedia of Gemstones (2nd Edition) is now available free as a PDF. www.joelarem.com/color-encyclopedia-of-gemstones.html This is a fantastic resource!

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Coming Soon. GT Pro Online

Gemstone Database++ Software for the Professional Gemologist, Student or Gemstone Enthusiast.

Version 9.3 for Windows

Video - See What GT Pro Has To Offer

Get the MOST Gemstone Information Available in One Package

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All Of The Below And Much More!

  • Diamond Weight Estimations
  • Colored Stone Weight Estimations
  • Gemstone Database (524 Gems)
  • Gemstone Separator
  • Inclusion Gallery (over 425 photos)
  • Cabochon Weight Estimator
  • Over 1000 Gemstone Photos
  • Color Gemstone Spectrum Images (both Prism and Diffraction)
  • Gemology Review Module
  • Specific Gravity Calculator
  • NAJA Diamond Cut Grading
  • Gemology Glossary
  • The Guide Akoya Pearl Grader
  • Custom Piece Calculator
  • Diamond Crown Angle Calculator
  • Round Diamond Recut Planner
  • Unit Converter
  • Carat Weight Charts
  • Calendar/Planner and Card File

Color & Light, the quarterly journal of the International Gem Society  calls Gemology Tools "the most complete database of gem information ever assembled." (Spring, 2004)

Gemology Tools Professional is Windows software that contains the most  comprehensive gemology references available. This program is intended  for the gemologist/appraiser, the gemology student or the casual  gemstone enthusiast. Included are such gemology aids as the Gemstone  Database which gives you access to information on over 1,950 gemstone  species, varieties, trade names and misnomers. Also included are the  Diamond Weight Estimator, the Colored Stone Weight Estimator, the Pearl  Grader (based on the system developed by The Guide), the diamond cut grading system devised by NAJA, a round diamond re-cutting analyzer and much, much more. The Gemstone  Database provides over 30 facts, properties and characteristics for most gemstones. Black Opal, Gemology Tools ProfessionalOver 1000 gemstone photographs are included. The Gemstone Database also  features the new Gemstone Separator, the easiest way to make a gem  identification and the new Inclusion Gallery which provides you with  over 350 visual examples of gemstone and diamond inclusions and surface  features. With access to over 1,950 gemstone species, varieties, trade  names and misnomers you can look up just about any fact, property,  characteristic or photograph in just seconds. With over 1000 gemstone  photographs, rough and cut, you can get a visual representation of many  gemstones and gemstone inclusions. You can sort the database by Specific Gravity which gives you a look at the densest (or least dense) gems, or by Refractive Index to see which gems have the highest RI (or the  lowest RI). You can use the Visual Crown Angle calculator to get a look  at how the crown angle changes when the table width or crown height is  changed. You can visit the Inclusion Gallery to view all kinds of  inclusions or surface features.

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Why is GT Pro such a bargain? After over 16 years of refinement GT Pro has more information and functionality than any book. If bought a book with half of the listings and photographs in the Gemstone Database you could pay at least $50 for it. You would pay $95 or more for a book with all of our inclusion photographs (if you could find one). It would cost you about $60 for a book of gem and diamond weight estimation formulas BUT the book won't automatically do the calculations for you!

In a best case scenario you would pay over $200 (probably MUCH more) for these three books. This is about $135 MORE than GT Pro for less information and functionality. And, if you ever go on the road you might need to lug all those books around. Not to mention that you get SO much more with GT Pro. Like the Pearl Grader, the NAJA Diamond Cut Grader, the Custom Piece Calculator, the Round Diamond Recut Planner, the measurement unit converter, the gem and jewelry glossary, the gemology review module, the weight estimation charts and even more. All your necessary gemology data in one spot. Fast, easy and inexpensive!

You will probably want to own many gemology books (we do) but GT Pro is your most cost effective gemology solution.

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