AM-2015-10017-A · Tourmaline (schorl)active
physical & structuralrev. 4
| designation | Tourmaline (schorl) |
|---|---|
| chemical formula | NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄ |
| classification | Cyclosilicate / Tourmaline group |
| crystal system | Trigonal |
| mohs hardness | 7 – 7.5 |
| density (g/cm³) | 3.13 |
| colour | Black |
| type locality | Chuquicamata, Antofagasta, Chile |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 220, 366, 710, 1064
notessubmitter remarks + registry
Photographic record retained. Specimen temperature held at lab ambient throughout intake.
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. |
|---|---|---|---|
| 2015-10-29 10:05 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | L.K. |
| 2015-10-31 12:04 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2015-11-07 08:31 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: AMCSD #4211 | S.W. |
| 2015-11-08 11:22 UTC | storage | re-bagged, label re-printed; placed in vault C, shelf 14, drawer 01 | L.K. |
| 2017-11-07 14:47 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2019-11-07 14:58 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2021-11-06 16:57 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
| 2023-11-06 09:50 UTC | re-inspection | seal intact · label legible · no visible degradation | T.J. |
physical location: vault C · shelf 14 · drawer 01 · last documented inspection: 2023-11-06 09:50 UTC