Discover unusual rocks called pegmatites, considered "Nature’s Giant Treasure Chests." Meet Dr. Michael Wise, geologist at the National Museum of Natural History. How would your life be different without these unique rocks? Pegmatites boast much larger mineral crystals than other rocks because of the conditions under which they form. Take a closer look at garnets, tourmalines, and other minerals that come from pegmatites. Find out how you depend on pegmatites for everyday uses, such as operating your cellphone.
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