| Sample | Hardness | Cleavage | Color | Streak | Luster | Other properties | Mineral |
| 1 | 6 | (2) 90 deg. | white/pink | - | vitreous | Feldspar | |
| 2 | 6+ | none | reddish brown | dark red | metallic | Hemetite | |
| 3 | 2-2.5 | (1) sheet structure | clear/whiteish | - | vitreous | Muscovite | |
| 4 | 2 | (1) but can't see | white/pink | - | dull | aggregated' | Clay (Kaolinite) |
| 5 | 7 | conchoidal fracture | clear/white/pink/purple | - | translucent | Quartz | |
| 6 | 3+ | (2) rhombohedron | white/clear | - | vitreous | fizzes in HCL | Calcite |
| 7 | 2.5-3 | (1) sheet structure | black/dark green | - | vitreous | Biotite | |
| 8 | 2.5 | (2) 90 deg. | white/clear | - | vitreous | salty | Halite |
| 9 | 2 | (3) | white | - | translucent | soft | Gypsum |
| 10 | 6.5 | conchoidal fracture | olive | - | vitreous | aggregated' | Olivine |
| 11 | 6 | (2) 90 deg | brassy | - | metallic | looks like gold | Pyrite |
| 12 | 2 | (1) sheet structure | dark grey | dark grey | greasy feel | Graphite | |
Last Update: 9/27/96
Name: Ben A. van der Pluijm