AM-2017-10014-A · Tourmaline (schorl)archived
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) | 3.14 |
| colour | Black with greenish termination |
| type locality | Dzhezkazgan, Karaganda, Kazakhstan |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 220, 713, 1063
notessubmitter remarks + registry
Donated as part of a private estate; no individual provenance retained.
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. |
|---|---|---|---|
| 2017-11-28 11:01 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | S.W. |
| 2017-12-01 11:13 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | H.D. |
| 2017-12-03 11:52 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: ICDD card 04-9810 | H.D. |
| 2017-12-06 13:04 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 12, drawer 28 | S.W. |
| 2019-12-06 13:22 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2021-12-05 16:05 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2023-12-05 14:04 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
| 2025-12-04 11:03 UTC | re-inspection | seal intact · label legible · no visible degradation | V.O. |
physical location: vault D · shelf 12 · drawer 28 · last documented inspection: 2025-12-04 11:03 UTC
errata · corrections of record1 entry
The following corrections have been issued for this record since accession. Original values are retained here for citation purposes; the canonical metadata above reflects the most recent correction.
| id | issued | field | was | now |
|---|---|---|---|---|
| ERR-2023-0001 | 2023-03-10 | crystalSystem | trigonal | trigonal (R3̄c) |