Step 1 — Rinse

Rinse each shell in fresh cool water on the beach or at the rental. Removing sand and salt first prevents mineral staining later.

Step 2 — Soak

Soak shells in fresh water overnight, changing the water once. This dissolves remaining salt and softens dried organic matter.

Step 3 — Gently Brush

A soft toothbrush is enough for most shells. For delicate murex fronds and small scallops, skip the brush and let the soak do the work.

Step 4 — Dry Slowly

Air-dry on a towel out of direct sunlight for 24–48 hours. Direct sun fades colour, especially on tulips and calico scallops.

The Smell Test

A persistent ocean smell almost always means residual organic matter. Repeat the soak with a mild dish-soap solution, then rinse and re-dry. Reserve bleach for shells that are still noticeably smelly after two soaks — and dilute it heavily (1:4 with water) to protect surface colour.