Mineral - Lava Stone

Name Lava Stone
Class Silicates
Category Volcanic rock
Crystal system Amorphous
Chemical composition Mainly silicon dioxide (SiO₂), with iron, magnesium, calcium, sodium, and potassium oxides
Hardness (Mohs scale) 5 to 5.5
Transparency Opaque
Geographical origin Iceland, Italy, Mexico, Indonesia, United States, Hawaii