Shoreline
Malachite.

Collection notes

A green copper-stained seam on a rocky coastal cut.

The strongest green hugs a narrow crack. It fades to a powdery film on the grey rock, stopping abruptly at a pocket of rusty stone.

For a geology field card, plot the principal seam in Seam Emerald, extend its margins in Copper Green and mark iron pockets in Iron Pocket.