AM-2019-10018-A · Malachiteactive
physical & structuralrev. 1
| designation | Malachite |
|---|---|
| chemical formula | Cu₂(CO₃)(OH)₂ |
| classification | Carbonate / hydrous |
| crystal system | Monoclinic |
| mohs hardness | 3.5 – 4 |
| density (g/cm³) | 4.09 |
| colour | Banded green |
| type locality | Bahia, Brazil |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 155, 178, 434, 1097
notessubmitter remarks + registry
Malachite of ordinary appearance and habit. Retained for completeness of the locality record.
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. |
|---|---|---|---|
| 2019-03-24 08:13 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | C.B. |
| 2019-03-29 09:56 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | M.A. |
| 2019-04-03 10:55 UTC | pass B | Raman acquisition; 4 peaks above prominence threshold instrument: Renishaw inVia (532 nm) ref. checked: COD entry 159449 | M.A. |
| 2019-04-06 12:21 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 17, drawer 31 | C.B. |
| 2021-04-05 16:23 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
| 2023-04-05 13:17 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
| 2025-04-04 16:58 UTC | re-inspection | seal intact · label legible · no visible degradation | S.W. |
physical location: vault B · shelf 17 · drawer 31 · last documented inspection: 2025-04-04 16:58 UTC