Obsidian in Perlite

Item number: MIN6032

Price: EUR 45.00 

 Perlite is an amorphous volcanic glass with relatively high water content. Perlite is formed by the hydration of Obsidian. Obsidian is an acidic igneous rock belonging to volcanic glasses that are formed in the final stage of a volcanic eruption. The difference between perlite and obsidian lies in the crystal water content. Obsidian contains less than 2 percent bound water, perlite 2-5 percent. 

Size 90x75x55 mm
Crystal size (max.) 32 mm
Weight 408 g
Locality Picketpost Mountain area, Superior, Superior Mining District, Pinal County, Arizona, USA