AM-2025-10001-A · Garnet, var. almandineactive
physical & structuralrev. 3
| designation | Garnet, var. almandine |
|---|---|
| chemical formula | Fe₃Al₂(SiO₄)₃ |
| classification | Nesosilicate / Garnet group |
| crystal system | Cubic |
| mohs hardness | 6.5 – 7.5 |
| density (g/cm³) | 4.33 |
| colour | Wine red, dodecahedral |
| type locality | South Crofty mine, Cornwall, England |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 350, 914, 1053
notessubmitter remarks + registry
Photographic record retained. Single-pass examination only; no follow-up planned. Re-pass note (2026-08-23). Re-pass on 2026-08-23 reproduces previous measurements within experimental uncertainty; specimen returned to storage.
chain of custody4 events · 1 seal-break
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. |
|---|---|---|---|
| 2025-01-01 08:03 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | C.B. |
| 2025-01-05 08:54 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | C.B. |
| 2025-01-10 14:31 UTC | pass B | Raman acquisition; 3 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: COD entry 146234 | C.B. |
| 2025-01-13 10:46 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 02, drawer 09 | C.B. |
physical location: vault B · shelf 02 · drawer 09 · last documented inspection: 2025-01-13 10:46 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-2025-0001 | 2025-06-05 | mohs | 6 | 6–6.5 |