Can somebody give me information on the white rocks with black veins ? Found in Cornwall, England , there were seams of it through the slate rocks on the beach. : r/whatsthisrock

Does anyone know what this rock is? It was found on a beach in

Pretty heavy rock, got it in a bowl with a bunch of other rocks

I found some black, light weight, soft rocks near a river. They

Beach to explore while on holiday in Cornwall

Rough sea in cornwall hi-res stock photography and images - Alamy

Beach Stones with White Lines & Patterns – Jessica's Nature Blog

Can anyone help identify these rocks I found on the beach? : r

The Chalk Coast of Sussex

Pretty heavy rock, got it in a bowl with a bunch of other rocks