| Visual Appearance | Picture | Likely Identity | Context |
|---|
| Deep Purple |  | Potassium Manganate(VII) () | |
| Bright Orange |  | Potassium Dichromate(VI) () | |
| Pale Blue |  | Copper(II) ions () | |
| Pale Green |  | Iron(II) ions () | |
| Yellow/Brown/Rust |  | Iron(III) ions () or Iodine () | |
| Deep green |  | **Chromium (III) ions () | |
| Visual Appearance | Picture | Likely Identity | Context |
|---|
| Green Powder |  | | |
| Blue Crystals |  | | |
| Black Powder |  | | |
| Dark Purple/Black Crystals |  | | |
| Pale Green Crystals |  | | |
| Rust / Orange-Brown Powder |  | | |
| White Powder / Crystals |  | | |
| Visual Appearance | Picture | Likely Identity | Context |
|---|
| Silver / Grey Ribbon |  | | |
| Silver / Grey Foil |  | | |
| Grey Powder |  | | |
| Red-Brown / Pink-Brown Solid |  | | |