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Earth Grows Fine Gemstones in Minutes

Dragon
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Earth Grows Fine Gemstones in Minutes  Empty Earth Grows Fine Gemstones in Minutes

Post by Dragon Wed Oct 07, 2020 1:43 am

Rome wasn’t built in a day, but some of Earth’s finest gemstones were, according to new research from Rice University.

Aquamarine, emerald, garnet, zircon and topaz are but a few of the crystalline minerals found mostly in pegmatites, veinlike formations that commonly contain both large crystals and hard-to-find elements like tantalum and niobium. Another common find is lithium, a vital component of electric car batteries.

Pegmatites are formed when rising magma cools inside Earth, and they feature some of Earth’s largest crystals. South Dakota’s Etta mine, for example, features log-sized crystals of lithium-rich spodumene, including one 42 feet in length in weighing an estimated 37 tons.

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Earth Grows Fine Gemstones in Minutes  334pu7m
Dragon
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Post by Dragon Wed Oct 07, 2020 1:46 am

Earth Grows Fine Gemstones in Minutes  Black-Tourmaline-Going-to-Pink-Tourmaline-777x518
Credit: Patrick Phelps/Rice University

Black tourmaline going to pink tourmaline within a quartz pegmatite at California’s Stewart Lithia mine.

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Earth Grows Fine Gemstones in Minutes  334pu7m
Dragon
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Post by Dragon Wed Oct 07, 2020 1:53 am



Abandoned Etta Mine in the Black Hills of South Dakota


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