Mar 08
The Hardest Mineral is??? Yeah you know this...but it is still interesting to read the details isn't it?
Diamond is the hardest mineral, number 10 in the Mohs scale of mineral hardness. This 4-millimeter specimen shows several faces of diamond's natural crystal form, which is an octahedron—imagine two pyramids joined base to base so their tips point opposite directions. The flat triangles on the diamond correspond to the faces of the octahedron. Crystallographers call them (111) faces, and they are the hardest part of the diamond. Diamond crystals usually have rounded, grooved edges as can be seen next to the flat faces.
Read on...http://geology.about.com/library/bl/images/bldiamond.htm
Posted by Jay Roberts at 06:09 PM | Permalink
