Scottish Lewisian Gneiss - Polished Slice

Polished slice of Scottish Lewisian Gneiss.

Scottish Lewisian
The Scottish Lewisian is hand-mined on the Isles of Lewis, Harris and North Highlands.
Lewisian is part of the ancient bedrock of Scotland and it is one of the oldest rocks in the world, as it is estimated to be about 3 billion years old!
The unique combination of colours and structures comes from the different minerals that the Lewisian is composed of, these are mainly Feldspar, Quartz and Epidote.