Sea Glass and Other Beach Finds
Not everything on the tideline was once alive. Among the shells and driftwood you will find worn glass, fragments of pottery and the bleached remains of sea creatures. These finds are shaped by the same forces — tumbling sand, moving water and time — and reading them follows the same patient approach.
What sea glass actually is
Sea glass starts as ordinary discarded glass: bottles, jars and tableware that entered the water and were broken into fragments. Years of tumbling against sand and gravel round the edges and etch the surface, producing the soft frosted finish that distinguishes weathered sea glass from a freshly broken shard. The frost comes from countless tiny surface pits, not from any coating.
Reading colour
Green, brown and clear pieces are the most common because those colours were the most widely produced for bottles and jars. Less common colours reflect rarer original sources. Colour alone is suggestive rather than conclusive, so treat it as one clue among several.
Telling weathered from fresh
- Edges: genuine sea glass has rounded, softened edges; sharp corners mean recent breakage.
- Surface: a uniform frosted texture develops over long exposure.
- Pitting: fine surface pits scatter light and dull the shine.
Pottery and other worn fragments
Fragments of ceramic and stoneware turn up on many shores, especially near old harbours and settlements. Like glass, they lose their sharp edges over time, and any glaze gradually wears. A piece with a smooth, rounded profile has spent far longer in the water than one with crisp breaks.
Once-living finds
The flat, disc-shaped objects often called sand dollars are the internal skeletons, or tests, of certain sea urchins. Live, they are covered in fine spines and are usually darker; the pale, brittle disc on the beach is what remains after the animal has died and the spines have worn away. The five-petal pattern on the surface marks where breathing structures once sat. Tests are fragile, so beach finds are frequently cracked.
| Find | Origin | Tell-tale sign |
|---|---|---|
| Sea glass | Discarded glass | Frosted surface, rounded edges |
| Worn pottery | Ceramic fragments | Smoothed breaks, faded glaze |
| Sand dollar test | Sea urchin skeleton | Pale disc, five-petal pattern |
Leave-it-better habits
Distinguishing a natural find from genuine litter matters. Fresh, sharp glass and plastic are debris worth removing; well-worn sea glass and natural tests are part of the shore. Where collection is restricted, photograph and record rather than remove.
References
Last updated: May 29, 2026