The Lewisian gneiss stone circle at Callanish on an early autumnal morning with clouds forming above, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

The Lewisian gneiss stone circle at Callanish on an early autumnal morning with clouds forming above, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Giant Lewisian gneiss rock on a showery evening at Mealista on the south west coast of Lewis, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Strong folding in garnet gneiss, Hammerfest, Norway, Scandinavia, Europe

Lewisian gneiss, one of the oldest rocks on earth formed 2 billion years ago, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Outcrop of Manhattan gneiss which forms bedrock for skyscrapers, Central Park, New York City, New York, United States of America (U.S.A.), North America

yellow mountain saxifrage, saxifraga aizoides, on lewisian gneiss, scotland

Pattern of Gneiss rock, valley of Verzasca, Verzasca, Ticino, Switzerland

Light-coloured ortho gneiss, metamorphic rock, which has been deeply cut by the Verzasca River near Lavertezzo, Valle Verzasca, Ticino, Switzerland, Europe

Standing Stones of Callanish (Callanish 1) on the Isle of Lewis in the Outer Hebrides. The megalithic monument is cross shaped with a central ring of stones and was buildt between 2900 and 2600 BC. It is probably oriented towards the moon not the sun. Europe, Scotland, July

Standing Stones of Callanish (Callanish 1) on the Isle of Lewis in the Outer Hebrides. The megalithic monument is cross shaped with a central ring of stones and was buildt between 2900 and 2600 BC. It is probably oriented towards the moon not the sun. Europe, Scotland, July

Standing Stones of Callanish (Callanish 1) on the Isle of Lewis in the Outer Hebrides. The megalithic monument is cross shaped with a central ring of stones and was buildt between 2900 and 2600 BC. It is probably oriented towards the moon not the sun. Europe, Scotland, July

Standing Stones of Callanish (Callanish 1) on the Isle of Lewis in the Outer Hebrides. The megalithic monument is cross shaped with a central ring of stones and was buildt between 2900 and 2600 BC. It is probably oriented towards the moon not the sun. Europe, Scotland, July

Standing Stones of Callanish (Callanish 1) on the Isle of Lewis in the Outer Hebrides. The megalithic monument is cross shaped with a central ring of stones and was buildt between 2900 and 2600 BC. It is probably oriented towards the moon not the sun. Europe, Scotland, July

Washington Monument, Washington, District Of Columbia, United States Of America

Monoliths prepared in gneiss Lewis, erected about 2000 years BC.