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Trentino Porphyry
This stone is older than it looks. Send it to someone five minutes away.
Just found Trentino Porphyry in Argyle Walk.
Permian porphyry, quarried at Trento-Bolzano region, Italy. Nearest stop: King's Cross St Pancras.
This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/115-argyle-walk/
The closest other recorded buildings.
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