AM-2016-10008-A · Topazarchived
physical & structuralrev. 4
| 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 | Mont Saint-Hilaire, Quebec, Canada |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 265, 288, 400
notessubmitter remarks + registry
Crystals up to 5 mm on edge, with euhedral faces. On quartz matrix.
chain of custody8 events · 5 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. |
|---|---|---|---|
| 2016-07-07 13:46 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2016-07-12 08:03 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2016-07-15 16:20 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: RRUFF R05007 | S.W. |
| 2016-07-17 08:04 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 15, drawer 14 | T.J. |
| 2018-07-17 12:33 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2020-07-16 09:23 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2022-07-16 16:55 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2024-07-15 12:36 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
physical location: vault A · shelf 15 · drawer 14 · last documented inspection: 2024-07-15 12:36 UTC