AM-2018-10014-A · Tourmaline (schorl)unverified
withdrawal on file: physical specimen lost in transit between facilities (recorded 2014-10-03; classification withdrawn).
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. 3
| 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) | 3.10 |
| colour | Black with greenish termination |
| type locality | Schwarzwald, Baden-Württemberg, Germany |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 221, 365, 709, 1062
notessubmitter remarks + registry
Donated as part of a decommissioned teaching collection; no individual provenance retained.
chain of custody7 events · 4 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. |
|---|---|---|---|
| 2018-06-25 11:19 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | T.J. |
| 2018-06-29 16:06 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2018-07-07 09:51 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Horiba LabRAM HR (532 nm) ref. checked: RRUFF R05008 | S.W. |
| 2018-07-09 09:15 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 22, drawer 24 | T.J. |
| 2020-07-08 14:45 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2022-07-08 16:52 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
| 2024-07-07 11:08 UTC | re-inspection | seal intact · label legible · no visible degradation | P.S. |
physical location: vault B · shelf 22 · drawer 24 · last documented inspection: 2024-07-07 11:08 UTC