AM-2015-00112-A · Topazarchived
physical & structuralrev. 2
| designation | Topaz |
|---|---|
| chemical formula | Al₂SiO₄(F,OH)₂ |
| classification | Nesosilicate |
| crystal system | Orthorhombic |
| mohs hardness | 8 |
| density (g/cm³) | 3.55 |
| colour | Sherry-brown |
| type locality | Ouro Preto, Minas Gerais, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 266, 290, 401, 932
notessubmitter remarks + registry
Imperial topaz coloration; gem-quality clarity.