Here's the perfect introduction to the treasures of the earth: The Rock and Crystal Collection Kit. What's inside?-- A paperback version of the colorful guide, Collecting Rocks and Crystals.-- Real samples of Marble, Granite, and Oolitic Limestone to get any collection off to a terrific start. The great-looking box has windows to show off the stones and to keep them -- and the book -- organized and ready for a day out.