Materials
- Basalt (basic igneous rock)75 objects
- Quartzite37 objects
- Chert21 objects
- Sandstone9 objects
- Granite (rock)8 objects
- Obsidian7 objects
- Quartz (mineral)7 objects
- Slate (rock)7 objects
- Acetate film6 objects
- Plate glass6 objects
- Stone (worked rock) (stone)6 objects
- Flint (rock)4 objects
- Hornfels3 objects
- Igneous rock3 objects
- Stone (worked rock)3 objects
- Jade (rock)2 objects
- Jadeite2 objects
- Serpentine (mineral)2 objects
- Andesite1 objects
- Lava1 objects