Bonfire Glass
Melted and fused glass
Also known as Melted beach glass, Slag glass, Fused glass
Markings and exact colorations may vary.
Glass melted and fused in heat, then worn by the surf—lumpy, swirled and sometimes multi-colored.
- Typical size
- 0.5–3 in
- How often it turns up
- Uncommon
- Collecting
- Check local rules
- Handling
- Sharp edges
Loose glass may be collectable where permitted; follow park and protected-area rules. Do not take from archaeological sites or wreck contexts. Dispose of sharp modern litter safely.
How to tell it apart
- Blobby, drippy, or fused shapes
- Bubbles and colour swirls inside
- Sometimes sand or ash embedded
Found one?
Photograph it and BeachNut ranks the likely matches with a confidence read, then logs it to your collection with the beach and date.
Browsing beaches and the full field guide is free. A free account logs unlimited finds and gives you three photo identifications a day.
More sea glass in the field guide
Get the weekend beach score by email
Before each weekend: which Florida beaches score best for finds. No spam, unsubscribe any time.