The Gem State (Outdoor Idaho)
Discover the fascinating world of gems. Are they igneous, metamorphic or sedimentary rocks? Why are they hard? And what makes them "pretty"? Discover why Idaho is called "The Gem State" and what geological forces were involved in the formation of gemstones. Find out what's so special about star garnets, jasper, opals and agates?
Aired: 04/04/02Video has closed captioning.