"iGem II" was designed for the iPad running from iOS 5-7. Optimized for the "iPad" with Retina display."iGem II" is a full featured professional application that assist Gem Trade Professionals & Gem Enthusiasts in weight estimation, identification & evaluation of commonly encountered gems in the industry. Programmed & designed by a verifiable Graduate Gemologist for Gem Trade Professionals and Gem Enthusiasts. Colored Stones included are: Andalusite, Apatite, Benitoite, Beryl (Aquamarine, Heliodor, Morganite,and all Colored, Emerald both Synthetic & Natural), Chrysoberyl, Alexandrite, (Colored, Synthetic & Natural), Corundum (Blue Sapphire, Ruby and Fancy Sapphire, Pink Sapphire, etc. - both Natural & Synthetic), Diamonds Natural, Diopside, Garnet (Almandite, Andradite, Grossularite, Malaia, Pyrope, Rhodolite & Spessartite), Iolite, Peridot, Quartz (Amethyst & Citrine - no AGG yet), Sphene, Spinel Natural & Synthetic, Spodumene (Kunzite), Topaz, Tourmaline, Zoisite and Zircon. Stones with low desirability due to Poor Physical Properties and/or Optical Properties have been excluded and will be added as requested. These stones only have value to a narrow segment of the scientific community e.g., "Mineralogist". Efficient, Intuitive & Simple! Open the App, Do Your Business and Get Out in no time! No Manual, No Video. Designs based on how a gemologist, jeweler and professional would approach their daily gem interactions. In addition to 11 established Diamonds Cuts Array, Weight Estimator functions provides 14 "Established" Faceted Colored Stone Cuts with 60 combination Gem Species and Varieties, delivering a total of "840" Gem Counts without 'redundant' gem entries seen in other sub-standard application. These can all be leveraged on your iPad. More gems will be added on subsequent updates. Entering Length & Width values automatically populates Average Diameter or Average Width and Total Depth as well. Major convenience when working on Ideal, Excellent and Very Good Proportioned Gems Gem Reference Section, provides quick, detailed Physical and Optical Properties with Spectra Readings of commonly encountered Gems and is only a tap away. Size to Weight Tables of Diamonds (All Shapes) and Colored Gems are included for quick reference.