Coastal tones

Cuttle
Chalk.

A white cuttlebone holds its delicate ridges against a porous black rock.

The palette.

Approximate colour previews

Chalk Chamber

Collection notes

Even the broken edge is orderly, a stack of thin walls made visible by shadow. A rim of trapped water turns the chalk a faint green.

For a natural history plate, draw the outer silhouette in Basalt Pore and layer Pale Mint behind the chamber detail.