Adam Conover writes:

Jadeite is a form of Jade, obviously. I'm not sure that Nephrite
exists... my chemistry teacher hadn't heard of it, anyway.

Nephrite is the _other_ form of jade.  Both the minerals jadeite and
nephrite are commonly called jade; nephrite is the more valuable
variety.

-- 
Jeffery "Taper" Wickel                            jtwickel@nyx.net 
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"We are always getting ready to live, but never living."
		-- Ralph Waldo Emerson (1803-1882), "Journals"