AM-2009-00171-A · Quartz, var. smokyarchived
physical & structuralrev. 2
| designation | Quartz, var. smoky |
|---|---|
| chemical formula | SiO₂ |
| classification | Tectosilicate / Quartz group |
| crystal system | Trigonal |
| mohs hardness | 7 |
| density (g/cm³) | 2.65 |
| colour | Smoky brown to near-black |
| type locality | Cairngorm Mountains, Scotland |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 128, 206, 464
notessubmitter remarks + registry
Coloration attributed to natural irradiation of structural Al impurities. Specimen photograph (orig.) not retained.
chain of custody8 events · 6 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. |
|---|---|---|---|
| 2009-01-08 15:47 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | S.W. |
| 2009-01-09 11:48 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | P.S. |
| 2009-01-20 11:45 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #5014 | P.S. |
| 2009-01-23 08:24 UTC | storage | re-bagged, label re-printed; placed in vault A, shelf 06, drawer 32 | S.W. |
| 2011-01-23 13:18 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2013-01-22 15:58 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2015-01-22 12:40 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2017-01-21 16:37 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
physical location: vault A · shelf 06 · drawer 32 · last documented inspection: 2017-01-21 16:37 UTC