There are chunky quartz conglomerates, colorful sandstones, and rocks that sparkle with quartz or pyrite. There are many different kinds of rocks. Some people's favorite rocks have been gathered from the gravel road near home, while other were collected on trips taken with rockhound clubs or by visiting a local quarry.
People can look at rocks over and over again.
They can compare their colors and feel their different textures, noticing what makes each rock special. If you like rocks and you'd like to learn more about them or meet with other folks who enjoy rocks, then here's some information to get started with. You can submit your own articles if you like. They have other resource links as well. This unique model for National Geographic Online takes you to Yellowstone National Park and Iceland to study glaciers, volcanoes, geysers, and geothermal energy.