AM-2008-10011-A · Malachitearchived
physical & structuralrev. 2
| designation | Malachite |
|---|---|
| chemical formula | Cu₂(CO₃)(OH)₂ |
| classification | Carbonate / hydrous |
| crystal system | Monoclinic |
| mohs hardness | 3.5 – 4 |
| density (g/cm³) | 4.05 |
| colour | Bright green crusts |
| type locality | Imider mine, Drâa-Tafilalet, Morocco |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 176, 218, 270, 435, 1097
notessubmitter remarks + registry
Crystals up to 15 mm on edge, with euhedral faces. No accompanying matrix.
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. |
|---|---|---|---|
| 2008-05-19 13:21 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | R.E. |
| 2008-05-22 14:25 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | C.B. |
| 2008-06-02 14:23 UTC | pass B | Raman acquisition; 5 peaks above prominence threshold instrument: Renishaw inVia (532 nm, low-power head) ref. checked: AMCSD #7026 | C.B. |
| 2008-06-03 13:45 UTC | storage | re-bagged, label re-printed; placed in vault D, shelf 13, drawer 29 | R.E. |
| 2010-06-03 10:23 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2012-06-02 16:16 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2014-06-02 12:51 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
| 2016-06-01 09:40 UTC | re-inspection | seal intact · label legible · no visible degradation | C.B. |
physical location: vault D · shelf 13 · drawer 29 · last documented inspection: 2016-06-01 09:40 UTC