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.