AM-2010-10007-A · Chalcedonyarchived
physical & structuralrev. 1
| designation | Chalcedony |
|---|---|
| chemical formula | SiO₂ |
| classification | Tectosilicate / cryptocrystalline quartz |
| crystal system | Trigonal |
| mohs hardness | 6.5 – 7 |
| density (g/cm³) | 2.62 |
| colour | Mottled grey-white |
| type locality | Freiberg district, Saxony, Germany |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 128, 463, 503
notessubmitter remarks + registry
Submitter cited the type locality. Specimen retained for reference; no chain-of-custody documentation available beyond the submission packet.
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. |
|---|---|---|---|
| 2010-07-14 13:14 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2010-07-19 12:55 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2010-08-03 14:18 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: ICDD card 04-2195 | T.J. |
| 2010-08-04 15:03 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 03, drawer 19 | R.E. |
| 2012-08-03 11:09 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2014-08-03 14:14 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2016-08-02 10:56 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
| 2018-08-02 11:47 UTC | re-inspection | seal intact · label legible · no visible degradation | L.K. |
physical location: vault B · shelf 03 · drawer 19 · last documented inspection: 2018-08-02 11:47 UTC