Crystal Guide Pocket Edition This is only $1.99 for a limited time, that's 25% off from the usual price. It's got the full data and facts and science for hundreds of crystals, as well as their healing, spiritual, numerology, elixir, and chakra information. Comprehensive.

Mineral Clock Collection This is an amazing collection of clock faces for Android that appear to be made out of various minerals - with healing info about each of those. Includes 29 different clocks - including opal, diamond, tiger eye, moonstone, onyx, agate, and more.

Mineral photo search This app contains the written info for "The Digital Mineral Picture Book" which contains over 4500 minerals. You can d/l the photos from another source.

Mineral crystallogram This app lets you draw a mineral crystal. There are about 700 crystal data files built into this app. Amazing!

Mineral Picture Book(Trial) This is also a version of "The Digital Mineral Picture Book" - this trial version contains about 200 minerals.