AM-2026-00004-A · Native copperarchived
physical & structuralrev. 1
| designation | Native copper |
|---|---|
| chemical formula | Cu |
| classification | Native element |
| crystal system | Cubic |
| mohs hardness | 2.5 – 3 |
| density (g/cm³) | 8.96 |
| colour | Copper-red, tarnishing brown |
| type locality | Kambove, Haut-Katanga, DR Congo |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 287, 541
notessubmitter remarks + registry
Arborescent aggregate of small interlocking crystals on a partially oxidised matrix. Surface tarnish ranges from brown to patchy green. Submitted without locality documentation beyond the provincial level.
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. |
|---|---|---|---|
| 2026-05-09 16:55 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | N.P. |
| 2026-05-14 13:11 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | S.W. |
| 2026-05-16 08:51 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #3341 | S.W. |
| 2026-05-17 14:11 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 09, drawer 17 | N.P. |
physical location: vault B · shelf 09 · drawer 17 · last documented inspection: 2026-05-17 14:11 UTC