AM-2019-10004-A · Topazarchived
physical & structuralrev. 1
| designation | Topaz |
|---|---|
| chemical formula | Al₂SiO₄(F,OH)₂ |
| classification | Nesosilicate |
| crystal system | Orthorhombic |
| mohs hardness | 8 |
| density (g/cm³) | 3.58 |
| colour | Pale yellow |
| type locality | Inder, Atyrau, Kazakhstan |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 265, 288, 401, 933
notessubmitter remarks + registry
Submitter cited the type locality. Specimen retained for reference; no chain-of-custody documentation available beyond the submission packet.
chain of custody7 events · 4 seal-breaks
Events recorded against this accession in the registry's printed custody book. Operator initials are anonymous. Storage codes follow the convention vault-shelf-drawer.
| timestamp | stage | detail | op. |
|---|---|---|---|
| 2019-05-01 15:03 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | P.S. |
| 2019-05-06 08:14 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2019-05-20 16:22 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: AMCSD #4790 | L.K. |
| 2019-05-23 08:17 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 13, drawer 30 | P.S. |
| 2021-05-22 08:15 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2023-05-22 08:07 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2025-05-21 14:25 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
physical location: vault C · shelf 13 · drawer 30 · last documented inspection: 2025-05-21 14:25 UTC