![]() Opalįrom the Sanskrit “upala,” which means stone, Opal, just like Ammonite, has its origins go back in the Jurassic Period. It is believed that its pink hue is caused by tiny fibers of dumortierite inside the quartz.Īs you may already know, rose quartz has ornamental purposes – figurines, vases, jewelry. Its composition is silicon and oxygen, and it has a clear, glass-like appearance. The only mineral harder than quartz is diamonds. Quartz is the hardest of common minerals. Let’s talk about some of these specimens! Rose Quartz Rose quartz, geodes, opal, granite, turquoise, fool’s gold, unakite, ammonite, obsidian, or lapis lazuli are considered cool rocks due to their stunning colors and exciting shapes. What are Cool Rocks?īeauty is in the eye of the beholder, but many agree that these rocks are among the most awesome to collect: If you are interested in checking out the best books about rock and minerals identification you can find them by clicking here (Amazon link). What are Cool Rocks & Where to Find Cool Rocks ![]()
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