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You might question your clever book then, Apatite (calcium phosphate) is non-metallic
Quote from: Bored chemist on 12/11/2007 19:26:07Is it noticeably dense?Close to, but a bit more dense than hematite (iron oxide) Fe2O3
Is it noticeably dense?
Good thought, Molly would be proud of you.
Argentite. Right - lol - did the naming of that have anything to do with Argentina by any chance?Thanks Frethack I'll definitely chase up that book recommendation.Now.......................may I ?? What is *this* (from my collection)100 points to the one that can name the rock and place where I've found it (or rather haggled it from some native kids). And a box of choccies to the one that names me the fishies (been dying to know for years!) 
i read a lot of Agatha Christi.
I happen to poke my nose up from my books (4 tests in three days...just finished my sed rocks exam today) and - lo and behold - another mineral! Ill take a stab in the dark at it.How about Erythrite (the pink) and Cobaltkoritnigite (the purple).Both secondary minerals in cobalt bearing deposits (Cobalt blooms).
I see that frethack can concentrate on his mineralogy while the old curmudgeon is drinking mint juleps in Kentucky. Nice going!