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Photo Feature By Al Harris

Hairy Rocks & Needled Stones


They look like rocks containing hair and needles. Top: Polished rutilated quartz -- about the size of a quarter. Below: tourmalated quartz, roughly same size as the top photo, named for the tourmalated "needles" inside. According to JSU Professor Kelly Gregg, the included crystals are formed at the same time the quartz crystals are growing through chemical processes. He said the mineral rutile is a titanium oxide and that tourmaline is a highly variable group of minerals, some forms of which are themselves used as gems. From the gem and stone collection of Patt Harris.



 

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