13/06/2026
This fabulous piece of thick, dark "pirate glass," was amongst the seaglass I sorted yesterday.
It features a distinctive concave or domed base, which is characteristic of hand-blown glass bottles from the 18th and 19th centuries.
The glass is extremely dark and thick, appearing black until held up to the light.
The glass was made using iron oxide or coal ash to protect items like rum, water, and wine from sunlight and spoilage.
To the naked eye, these tumbled, sea-worn shards look completely black. However, when you hold them up to a strong light source they glow in deep hues of olive green, amber, or brown.
Pirates and sailors heavily relied on these durable spirits bottles and frequently tossed them overboard or left them behind in shipwrecks. Finding a piece of this rare glass connects directly to maritime history. 🤩
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