National Geographic Rock & Mineral Card Games

The National Geographic Rock And Mineral Playing Card Set Comes With A Standard 52 Card Deck And Over 75 Genuine Gemstones! You Can Play All Your Favorite Card Games, And Each Card Has A Gemstone, Rock, Or Mineral Fact On It, Making Them Great For Trivia And Memory Games Too. Instructions For Memory And Trivia Games Are Included, As Well As A Convenient Storage Bag For All Your New Specimens.