North Wales · Snowdonia slate belt
PENRHYN COURSE
Riven · Matte · Monochrome

Quarried before 1900 — split, not honed

The stone
marked once
in chalk.

Cool blue-charcoal cleaved along its natural layers, stacked like the receding courses of a Snowdonia roof — lifted by a single scratched white line.

This is the Welsh Slate design system, applied by Curio Design — a design-style library for AI agents. Full Welsh Slate guide → designbycurio.com/learn/slate-roofing-welsh