On this page are files you can freely download. Just click on the image to the left of the description to download the file.
A spreadsheet program that calculates the Optic Sign, Birefringence and specific Gravity of your stone based on a few simple measurements.
Mac, iPad, iPhone version. Requires Apple Numbers spreadsheet app. The will download as a ZIP file.
A one page PDF file of information on where to and not to buy your next dog
The following are all tools and references I use and recommend. I don’t recommend cheap tools typically found on eBay.
Unlike old-fashioned calcite dichroscopes, which only provide fuzzy colors, Professional Gem Tools dichroscopes contain high quality optics that allow the user to actually examine the stone.
Professional Gem Tool's patent pending design eliminates secondary internal reflections. This provides a clear and sharp image when viewing the stone.
Available from Colorwright
Gemology Tools Pro
Gemstone Software for the Professional Gemologist, student or gemstone enthusiast.
Includes Gemstone Database of over 500 gems, gemstone separator, inclusion gallery and much more.
Available from Gemology Tools Pro
Gem Identification Made Easy
Very handy reference book, good for all levels. Find it on Amazon
Gem LED gemstone refractometer with built in 589nm monochromatic filter. Directly and easily readable scale of 0.01 delineations from 1.30 to 1.81 nD. Accuracy 0.005 to be interpolated. Made in Germany.