AM-2011-10007-A · Chalcedonyactive
withdrawal on file: metadata insufficient for re-verification after the 2014 reorganisation (recorded 2015-05-04; classification withdrawn).
physical & structuralrev. 3
| designation | Chalcedony |
|---|---|
| chemical formula | SiO₂ |
| classification | Tectosilicate / cryptocrystalline quartz |
| crystal system | Trigonal |
| mohs hardness | 6.5 – 7 |
| density (g/cm³) | 2.63 |
| colour | Brownish-red |
| type locality | Bancroft, Ontario, Canada |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 129, 207, 463, 501
notessubmitter remarks + registry
Specimen accompanied by a single typewritten card listing the locality and the year of collection. No further provenance information.
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. |
|---|---|---|---|
| 2011-06-05 16:44 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2011-06-06 10:03 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | C.B. |
| 2011-06-21 11:43 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: RRUFF R05001 | C.B. |
| 2011-06-24 09:33 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 20, drawer 10 | R.E. |
| 2013-06-23 12:20 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2015-06-23 16:06 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2017-06-22 15:22 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2019-06-22 11:11 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
physical location: vault C · shelf 20 · drawer 10 · last documented inspection: 2019-06-22 11:11 UTC