Table III
Oxide Inclusions Throughout Body of 1837 Coin
| Oxide inclusion, identified by Raman spectroscopy ( |
Colour | Composition, determined by electron micro-probe analysis |
|---|---|---|
| Haematite | Bluish, with intense red internal reflections | Pure iron oxide |
| Magnetite (iron-deficient) | Greyish | 5 wt.% nickel oxide |