Lewisian

At 3 billion years old Lewisian Gneiss is one of the oldest rocks in the world and the oldest in the UK. This Gneiss is collected from the Isles of Lewis, Harris, Skye and Mull, and also found on mainland North West Scotland.
The Lewisian Gneiss complex is a mixture of many minerals including Quartz, Feldspar and Epidote with a rich history of volcanic and metamorphic events.

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