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Materials
- Obsidian952 objects
- Chert146 objects
- Basalt (basic igneous rock)33 objects
- Flint (rock)24 objects
- Quartzite18 objects
- Quartz (mineral)16 objects
- Opal glass15 objects
- Sandstone5 objects
- Petrified wood3 objects
- Gypsum1 objects
- Hornfels1 objects
- Siliceous rock1 objects