Talk:Royal Leerdam Crystal

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Glass Mid‑importance

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Graniver & Roccaver

Latest comment: 4 years ago1 comment1 person in discussion

The factory used to produce (in the 1930s) artificial stone materials called Graniver and Roccaver which were produced by pressing and melting glass beads together. — Preceding unsigned comment added by 77.61.180.106 (talk) 13:22, 13 September 2020 (UTC)Reply

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