How the World's Largest Aquamarine Gem Came to Be | Smithsonian Voices | National Museum of Natural History
March 16th, 2021, 6:00AM / BY Abigail Eisenstadt Dom Pedro aquamarine was cut from a 100-pound crystal that was mined in the late 1980s. It weighs around 4.6 pounds, making it one of the largest aquamarine gemstones in the world. (Donald E. Hurlbert, Smithsonian) For those who study what happens when magma and crust collide, igneous rocks like pegmatites are a welcome sight. But in addition to holding clues about Earth’s mineral and geologic processes, pegmatites deposits are known for containing diverse and richly colored mineral crystals that can be cut into spec...