Nineteenth-Century Geometric Or Three-Piece-Molded Glass

The introduction of the full-size three-piece mold increased production, so many glass items made between 1815 and 1845 are available today. Collectors often refer to three-piece-molded glass as geometric because the patterns include diamonds, concentric rings, and sunbursts. Photo: Glass Works The blown three-mold process was used to make this deep cobalt blue decanter. It […]