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Materials
- Obsidian171 objects
- Chert58 objects
- Basalt (basic igneous rock)50 objects
- Quartz (mineral)20 objects
- Siliceous rock16 objects
- Flint (rock)15 objects
- Quartzite9 objects
- Ceramic (material)1 objects
- Chalcedony1 objects
- Rhyolite1 objects
- Sandstone1 objects