AM-2026-00013-A · Olivine, var. fayalite (Fe₂SiO₄)archived
physical & structuralrev. 1
| designation | Olivine, var. fayalite (Fe₂SiO₄) |
|---|---|
| chemical formula | Fe₂SiO₄ |
| classification | Nesosilicate / Olivine group |
| crystal system | Orthorhombic |
| mohs hardness | 6.5 – 7 |
| density (g/cm³) | 4.39 |
| colour | Yellow-brown to greenish-black |
| type locality | Aris quarry, Khomas, Namibia |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 815, 839
notessubmitter remarks + registry
Granular aggregate of yellow-brown to greenish-black colouration with subconchoidal fracture. Submitted as part of a small consignment of Aris quarry material; locality recorded to quarry level only.
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. |
|---|---|---|---|
| 2026-07-31 15:12 UTC | intake | weighed, dimensioned, photographed; container sealed and labelled with the accession identifier | P.S. |
| 2026-08-01 09:11 UTC | pass A | visual inspection · density (Archimedes) · mass to ±0.01 g | L.K. |
| 2026-08-05 15:02 UTC | pass B | Raman acquisition; 2 peaks above prominence threshold instrument: Renishaw inVia (785 nm) ref. checked: ICDD card 04-9805 | L.K. |
| 2026-08-07 15:25 UTC | storage | re-bagged, label re-printed; placed in vault B, shelf 24, drawer 29 | P.S. |
physical location: vault B · shelf 24 · drawer 29 · last documented inspection: 2026-08-07 15:25 UTC