Rock Cycle - Rocks (4A) Quantity in Basket: none Code: RC-R4A Price: $10.75 Shipping Weight: 2.00 pounds Quantity: Investigate the three different types of rocks and learn how they are formed. Module shale, sandstone, conglomerate, gneiss , marble, slate, diatomite, schist, obsidian, granite, scoria, and basalt. (code RC-R4A)