Exciting Features: - Handy MINERAL chart.- GEMSTONE list. - Mineral CLASSIFICATION with groups and sub-groups.- An image GALLERY with lots of high quality images.- Image ZOOM feature- Participate in QUIZ and update your skills. - Compact Geological TIME-SCALE. - Geology DICTIONARY. - Advanced DETECTION of Hand Specimen.- NO IN-APP PURCHASE. Once bought, all features are unlocked and available.- Language support for- Italian, German, French, Spanish, Turkish, Portuguese, Russian. - Cool and Trendy background Themes. - OFFLINE & AD FREE.- Contact/ message us anytime in our Facebook Page for any query or help. We value all the users. >> So many features are yet to come. Stay updated. <<