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Graal glass is a technique developed by the Orrefors glasshouse in Sweden around 1916-1917. This method involves encasing colored relief decorations within a layer of clear crystal glass, resulting in a smooth outer surface. The Orrefors glasshouse was known for its elegant, modern designs that combined brilliant crystal with meticulous engraving techniques. This innovation contributed to the reputation of Orrefors as a producer of fine 20th-century art glass.1

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  1. silica mineral
  2. Orrefors glass
  3. glass

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