Victorian Slag Glass

Now popularly called slag glass because it was once assumed the waste or 'slag' from coal and coke production was added to the glass to produce the purple, green or blue marbled glass typical of the three North Eastern glasshouses of Sowerby, Greener and Davidson. First used by Sowerby (who were also the major manufacturer), it was originally called 'Malachite'. For more details visit Premier Antiques

Sowerby Purple Malachite 'Basket Weave' Plate c1880

Greener Blue Malachite 'Jubilee' Cream and Sugar c1887

Davidson's Purple Malachite 'Thimbleful' Measure c1880

Sowerby Green Malachite 'Cauldron' Posy Vase c1880