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

Geology of Rocks: Treasures From the Beach and Where They Come

Rock Lines are Tell-Tale Signs

Cornwall shale hi-res stock photography and images - Alamy

Quartz rock formation hi-res stock photography and images - Alamy

sedimentaryclassicshale500.jpg

I found some really hard Translucide purplish brown stones .What

Rock Lines are Tell-Tale Signs

Kynance Cove, Landewednack, Cornwall, England, UK

Black seams sandwiched within a white clay vein formed along a