Tuff
“Volcanic ash turned to stone”
Igneous
Tuff is a rock formed from consolidated volcanic ash and pyroclastic debris ejected during explosive eruptions. Once deposited and compacted, these ash layers lithify into a lightweight, easily carved stone used in construction for thousands of years.
Composition
volcanic glass fragments, pumice, feldspar, quartz
Where Found
Cappadocia (Turkey), Naples (Italy), Bandelier (New Mexico, USA), Easter Island
Mohs Hardness
3-5
Fun Fact
The famous fairy chimneys of Cappadocia and the houses carved into them are made of volcanic tuff, shaped by millennia of wind and water erosion.
Test Your Knowledge
What unique property makes tuff especially suitable for carving cave dwellings?
Related Specimens
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