Rhyolite
 
- Definition of rhyolite. : a very acid volcanic rock that is the lava form of granite
 
- Metaphysical Properties 
Perceived as a balancing stone, rhyolite is often recommended to increase self-esteem, self-worth while helping to bring resolution to issues. It is stone that is thought to facilitate change, variety and progress while helping to deal calmly with challenges.
 
- More Information 
Rhyolite is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained rock. The mineral assemblage is predominantly quartz, sanidine and plagioclase. It is the extrusive equivalent to granite.