Play cards and learn about rocks and minerals! Anyone who enjoys the outdoors will love these cards for playing your favorite games or to use as flash cards. Based on the top-selling Rocks & Minerals field guides by Dan R. Lynch, this gorgeous deck features full-color photographs of 54 different specimenssome of the most sought-after types found in the United States, like agates, quartz, and gold. Play your favorite card games while learning to identify rocks and minerals. The deck is a fun and thoughtful gift.