igneous rocks

Igneous Rocks

Ref:7 Granite Pink Granite with 8mm wide quartz vein. Collected from
Rinsey Cove, Cornwall, England on 2^nd April 1995.
Granite

Ref:4 Pitchstone (partially altered) from a narrow band of soft green
material above a pitchstone sill. Collected from Clauchland's Sill,
Clauchland's Point, Island of Arran, Scotland. Grid Ref NS056329
18^th October 1993
Altered Pitchstone

Ref:3 Pumice This specimen was given to me by a geology lecturer.
Pumice