AM-2017-10022-A · Topazarchived
physical & structuralrev. 3
| designation | Topaz |
|---|---|
| chemical formula | Al₂SiO₄(F,OH)₂ |
| classification | Nesosilicate |
| crystal system | Orthorhombic |
| mohs hardness | 8 |
| density (g/cm³) | 3.55 |
| colour | Pale blue |
| type locality | Franklin, Sussex County, New Jersey, USA |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 268, 402, 931
notessubmitter remarks + registry
Crystals up to 13 mm on edge, with euhedral faces. On quartz matrix.