AM-2025-10007-A · Topazarchived
physical & structuralrev. 3
| designation | Topaz |
|---|---|
| chemical formula | Al₂SiO₄(F,OH)₂ |
| classification | Nesosilicate |
| crystal system | Orthorhombic |
| mohs hardness | 8 |
| density (g/cm³) | 3.51 |
| colour | Pale blue |
| type locality | Itinga, Minas Gerais, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 264, 290, 400, 930
notessubmitter remarks + registry
Submitter cited the type locality. Specimen retained for reference; no chain-of-custody documentation available beyond the submission packet.