Obsidian in perlite
Oxides
Item number: MINS4396
Price: EUR 35.00
(incl. sales tax 7%).Gross price is indicated for recipient country = Germany. Net EUR 32.71. Amount of sales tax depends on delivery address (EU sales tax reform as of July 1, 2021). Country setting can be changed in the shopping cart.
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.
| Format | 12 (the sample fits or fills up the box of 94x85x30 mm. Sample might be higher than 30 mm) |
|---|---|
| Size | 95x90x60 mm |
| Crystal size (max.) | 35 mm |
| Weight | 573 g |
| Locality | Picketpost Mountain area, Superior, Superior Mining District, Pinal County, Arizona, USA |