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The Truth about Pirate Glass – Beachcombing Magazine
Identifying Black Sea Glass - YouTube
The Truth about Pirate Glass – Beachcombing Magazine
THE TRUE COLORS OF BLACK SEA GLASS – Echoes of LBI
Black Sea Glass Shard
Some of my recent finds from Seaham (NE England), the black glass all show different colours when a light is shone through, it's sometimes known as secret glass or pirate glass! :
Black Sea Glass
Pirate Glass. Found today at Point Lonsdale, Victoria, Australia. Anyone want to identify it? : r/seaglass