Gem Guide - Version 1.0 Free Guide to buying Quality Gem Stones - this guide will give you tips and tricks for buying, cleaning and identifying quality Sapphires, Tanzanite, Emeralds, Rubys, Opals, Garnets and more. Also includes GIA codes, GIA abbreviation codes and buying charts. This is a must have if you're considering buying any of above, or if you already have gems and just want to know more. This software is completely free.