Rhyolite
Rock
Also called Liparite
About it
Pale, fine-grained volcanic rock with the makeup of granite, often flow-banded or dotted with small quartz and feldspar crystals. The Yellowstone caldera is rhyolite; rainforest jasper and wonderstone are decorative rhyolites.
- Type
- Rock (igneous)
- Group
- Igneous (volcanic)
- Specific gravity
- 2.35–2.7
- Lustre
- dull
- Colours
- pink, light grey, cream, red, purple, banded
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.