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Opalescent vs Slag Glass – Mosser Glass Cats

February 21, 2020 By GlassKatz

Mosser Glass Cats - Aqua Opal and Blue Slag

New collectors are sometimes confused by the terms “opalescence” and “slag”. What do they mean and how do you distinguish them? Opalescence refers to transluscent whitish areas around the edges of a piece of glass, like the rim of a glass or the edges of a plate. Or in this case, a glass figurine. To […]

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