Materials
Select all that apply:
- Basalt (basic igneous rock)188 objects
- Quartzite135 objects
- Chert101 objects
- Flint (rock)55 objects
- Obsidian55 objects
- Quartz (mineral)38 objects
- Rhyolite4 objects
- Sandstone3 objects
- Basalt (basic igneous rock) (black)2 objects
- Porphyry2 objects
- Iron (metal) (rusted)1 objects
- Jasper1 objects
- Limestone1 objects
- Mudstone1 objects
- Opal1 objects
- Plaster1 objects
- Schist1 objects
- Steel (alloy)1 objects
- Wood (plant material)1 objects