Hold an entire gem collection in your pocket with this great geology app! Whether you are interested in earth sciences, or precious minerals, this is a great app to add to your collection!

Gemstones of the world have been prized since ancient times. Agate, Opal, Diamonds, Rubies, and Emeralds are just a few of the many minerals and gemstones found within this app. It would be a great companion to a more general mineral guide.

Test your knowledge with a challenging yet accessible gemstone quiz. Can you get them all right?

Gems are a beautiful and rare product of the natural world. Learn more about them with this great app!


• Challenging Quiz Game!

• Hi-resolution images!

• Detailed information!

• Retina Ready Graphics!

• Beautifully Animated Interface

• Universal app, iPhone 6 ready!

Creative Commons Photography Credit to:
Didier Descouens
Rob Lavinsky
Mary Hinkley
Eurico Zimbres
Tom Epaminondas

What’s New

Version 5.1

Minor Bug Fixes

Ratings and Reviews

1.0 out of 5
3 Ratings
3 Ratings
JAvDijk ,

For beginners

Just looked at it, my goodness you have option to buy some box of minerals or do the quiz, please I need the information about minerals not a trivia. Please refund my money!

Renae S88 ,

Only 35 minerals

This app only offers information on 35 minerals and they’re the most common minerals, ones most people already know. Ugh don’t buy

Hammeridaho ,


Quiz doesn't consistently give question. Map would be better if interactive. Give more info on specimens like typical strata associated with.


Harry Teel
25.9 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© htapps


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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