|
|||||
|
The chief of these are the garnets, crystallising in the cubic system, and anhydrous. The garnet is usually in the form of a rhombic dodecahedron, or as a trisoctahedron (called also sometimes an icosatetrahedron), or a mixture of the two, though the stones appear in other cubic forms. In hardness they vary from [...] To recapitulate certain of the facts respecting the diamond. -This wonderful gem has the distinction amongst precious stones of being unique; though many are composed of two, three, or but a small number of elements, the diamond is the only stone known consisting of one element, and absolutely nothing else -pure crystallised carbon. [...] |
 |
|||
Copyright © 2012 Crystal and stones - All Rights Reserved |
|||||
