Template:Hackmanite

From The Gemology Project
Revision as of 14:24, 23 December 2006 by Gemma (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Hackmanite
Chemical composition Natrium aluminium silicate
Crystal system Cubic
Habit Aggregate
Hardness 5 - 6
Refractive index ± 1.48
Specific gravity 2.15 - 2.40