Collection of 24 volcanic rocks and minerals The collection contains volcanic rocks and minerals.

The collection contains:

• Volcanic rocks: basalt, phonolite, pitchstone, rhyolite
• Lava: Lava from Vesuvius, basaltic lava and rhyoltic lava
• Pyroclasts: lapilli, volcanic ash, pumice stone
• Minerals: anorthite, anorthoclase, augite, cristobalite, hauyne, leucite, natrolite, nepheline, pickeringite, sanidine, sulphur, thaumasite, tridymite, obsidian.