AM-2009-10003-A · Quartz, var. citrineunverified
The classification below is preliminary. Spectroscopic confirmation is incomplete; values shown reflect the most recent analytical pass and may be revised without notice.
physical & structuralrev. 4
| designation | Quartz, var. citrine |
|---|---|
| chemical formula | SiO₂ |
| classification | Tectosilicate / Quartz group |
| crystal system | Trigonal |
| mohs hardness | 7 |
| density (g/cm³) | 2.66 |
| colour | Smoky-yellow |
| type locality | Ouro Preto, Minas Gerais, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 126, 208, 263, 695, 1084
notessubmitter remarks + registry
Crystals up to 24 mm on edge, with euhedral faces. Specimen mounted on a fragment of host rock.
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. |
|---|---|---|---|
| 2009-08-26 08:55 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2009-08-31 14:16 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | R.E. |
| 2009-09-10 10:34 UTC | pass B | Raman acquisition; 5 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: RRUFF R05009 | R.E. |
| 2009-09-12 10:33 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 12, drawer 13 | N.P. |
| 2011-09-12 13:44 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2013-09-11 11:42 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2015-09-11 09:33 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
| 2017-09-10 15:02 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
physical location: vault B · shelf 12 · drawer 13 · last documented inspection: 2017-09-10 15:02 UTC