AM-2024-10009-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) | 3.13 |
| colour | Black with greenish termination |
| type locality | Rio Marina, Elba, Italy |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 220, 365, 709, 1062
notessubmitter remarks + registry
Donated as part of a private estate; no individual provenance retained.
chain of custody5 events · 2 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. |
|---|---|---|---|
| 2024-02-10 12:33 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | L.K. |
| 2024-02-11 12:06 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | T.J. |
| 2024-02-24 09:22 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: ICDD card 04-5475 | T.J. |
| 2024-02-27 08:54 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 17, drawer 08 | L.K. |
| 2026-02-26 09:24 UTC | re-inspection | seal intact · label legible · no visible degradation | H.D. |
physical location: vault B · shelf 17 · drawer 08 · last documented inspection: 2026-02-26 09:24 UTC