AM-2018-10022-A · Tourmaline (schorl)archived
physical & structuralrev. 1
| 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) | 3.18 |
| colour | Black with greenish termination |
| type locality | Schneeberg, Saxony, Germany |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 220, 365, 713, 1064
notessubmitter remarks + registry
Submitter cited the type locality. Specimen retained for reference; no chain-of-custody documentation available beyond the submission packet.
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. |
|---|---|---|---|
| 2018-07-24 10:37 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2018-07-29 13:47 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | V.O. |
| 2018-08-06 10:33 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #6765 | V.O. |
| 2018-08-08 11:14 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 07, drawer 28 | R.E. |
| 2020-08-07 12:25 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2022-08-07 13:43 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
| 2024-08-06 14:20 UTC | re-inspection | seal intact · label legible · no visible degradation | M.A. |
physical location: vault B · shelf 07 · drawer 28 · last documented inspection: 2024-08-06 14:20 UTC