Positive tetrahedron
| View Cart ⇗ | Info
“The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all of the crystallographic axes at equal lengths. It can be considered as derived from the octahedron of the Normal Class by the omission of the alternate faces and the extension of the others.” — Ford, 1912
Galleries
PyramidsSource
William E. Ford Dana's Manual of Mineralogy (New York: John Wiley and Sons, Inc, 1912) 28
Downloads
2400×2070, 300.9 KiB
1024×883, 34.2 KiB
640×552, 21.7 KiB
320×276, 9.2 KiB