| Sample # |
17 |
| Mineral
Name |
LIMONITE/GOETHITE |
| Chemical Composition |
FeO(OH) |
| Luster |
Dull |
| Color(s) |
Dark brown, black, yellow-brown |
| Streak Color |
Brownish yellow |
| Specifc Gravity |
3.6-4 |
| Habit |
Limonite
usually massive; Goethite = bladed, prismatic |
| Cleavage/Fracture |
None |
| Hardness |
1.5-5.5 |
| Diagnostic Feature(s) | Color & streak; crystallinity distinguishes goethite from limonite |
