Malachite / Slag Glass Identification Guide + Gallery

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Slag glass, also commonly known as Malachite glass, is pressed glass made in the same way as Milk glass, but with coloured streaks to create a marble effect. Many of the same designs for milk glass were also produced in slag glass. Slag glass was made by British companies Sowerby, Davidson and Greener during the Victorian era, around the 1880's/90's, and was also produced in other European countries, most notably France. Sowerby marketed their slag glass under the name 'Malachite', and this name was used for all the colours they produced, even though technically it should only apply to green, as the name comes from the marbled green mineral 'malachite'. By far the most common colour for slag glass was purple, but it was also made in blue, turquoise, green, and brown glass. Modern slag glass is still being made today in USA, and comes in a variety of colours.

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Sowerby Malachite / Slag Glass

Sowerby #1148 Victorian Purple Malachite/Slag Glass Spill Vase

A Victorian purple and white British pressed malachite / slag glass spill vase. Made by Sowerby, pattern number 1148.

Sowerby #1192.5 Victorian Purple Malachite/Slag Glass Bowl

A Victorian purple and white British pressed malachite / slag glass basket shaped bowl. Made by Sowerby, pattern number 1192.5, marked.

Sowerby #1223 Victorian Purple Malachite/Slag Glass Vase

A Victorian purple and white British pressed malachite / slag glass spill vase. Made by Sowerby, pattern number 1223.

Sowerby #1231 MARKED Victorian Turquoise Malachite/Slag Glass Bowl

A Victorian turquoise and white British pressed malachite / slag glass bowl / trough. Made by Sowerby, pattern number 1231, marked.

Sowerby #1299 Victorian Purple Malachite/Slag Glass Bowl

A Victorian purple and white British pressed malachite / slag glass bowl. Made by Sowerby, pattern number 1299, marked.

Sowerby MARKED Victorian Purple Malachite/Slag Glass Tumbler

A Victorian purple and white British pressed malachite / slag glass half pint tumbler. Made by Sowerby, marked.

Sowerby #1259 Victorian Green Malachite / Slag Glass Bowl - Marked

A Victorian green and white British pressed malachite / slag glass bowl / pin dish. Made by Sowerby, pattern number 1259, marked.

Sowerby Victorian Purple Malachite / Slag Glass Cup - Marked

A Victorian purple and white British pressed malachite / slag glass cup. Made by Sowerby, marked.

Sowerby Victorian Purple Malachite/Slag Glass Tumbler

A Victorian purple and white British pressed malachite / slag glass tumbler. Made by Sowerby, marked.

Davidson Malachite / Slag Glass

Davidson 1890's Purple Malachite/Slag Glass Basket Bowl #234

A Victorian purple and white British pressed malachite / slag glass bowl. Made by Davidson, pattern number 234.

Davidson 1890's Victorian Malachite/Slag Glass Comport/Bowl

A Victorian purple and white British pressed malachite / slag glass bowl. Made by Davidson, marked.

Davidson 1890's Victorian Malachite/Slag Glass Tumbler

A Victorian purple and white British pressed malachite / slag glass half pint tumbler. Made by Davidson, marked.

Davidson 1890's Victorian Malachite/Slag Glass Tumbler

A Victorian blue and white British pressed malachite / slag glass half pint tumbler. Made by Davidson, marked.

Davidson 1890's Victorian Malachite/Slag Glass Vase

A Victorian purple and white British pressed malachite / slag glass vase. Made by Davidson, marked.

Davidson Victorian Purple Slag / Malachite Shot Glass

A Victorian purple and white British pressed malachite / slag glass "Just a Thimble Full" shot glass. Made by Davidson.

Davidson 1890s Victorian Blue Malachite/Slag Glass Jug

A Victorian blue and white British pressed malachite / slag glass creamer / jug. Made by Davidson.

Davidson Victorian Blue Malachite / Slag Glass Vase - Marked

A Victorian blue and white British pressed malachite / slag glass spill vase. Made by Davidson, marked.

Other Malachite / Slag Glass

Stölzle Czech Art Deco or Victorian Green Slag Glass Vase

A green and white Czech pressed malachite / slag glass vase. Made by Stölzle.

Imperial Glass Malachite/Slag Spill Vase - Marked

A Victorian style mid century turquoise and white pressed malachite / slag glass spill vase. Made by Imperial Glass, marked.

Victorian 1890's Blue Malachite/Slag Glass Bowl/Spill Vase

A Victorian blue and white British pressed malachite / slag glass bowl or spill vase. Manufacturer unknown.

Victorian 1890's Turquoise Malachite/Slag Glass Bowl

A Victorian turquoise and white British pressed malachite / slag glass bowl or spill vase. Manufacturer unknown.

Antique Victorian 1890s Blue Malachite/Slag Glass Bowl

A Victorian blue and white British pressed malachite / slag glass bowl. Manufacturer unknown.

Victorian 1890's Blue Malachite/Slag Glass Basket Bowl

A Victorian blue and white British pressed malachite / slag glass basket shaped bowl. Manufacturer unknown.

Victorian 1890's Blue Malachite/Slag Glass Basket Bowl

A Victorian blue and white British pressed malachite / slag glass basket shaped bowl. Manufacturer unknown.

Victorian 1890's Blue Malachite/Slag Glass Basket Bowl

A Victorian blue and white British pressed malachite / slag glass basket shaped bowl. Manufacturer unknown.

Victorian 1890's Malachite/Slag Purple Glass Spill Vase

A Victorian purple and white British pressed malachite / slag glass spill vase. Manufacturer unknown.

Victorian Purple Malachite/Slag Glass Footed Bowl/Dish

A Victorian purple and white British pressed malachite / slag glass footed bowl. Manufacturer unknown.

Victorian 1890's Turquoise Malachite/Slag Glass Vase

A Victorian turquoise and white British pressed malachite / slag glass vase. Manufacturer unknown.

Victorian 1890's Turquoise Malachite/Slag Glass Vase

A Victorian turquoise and white British pressed malachite / slag glass vase. Manufacturer unknown.

Pair of Victorian 1890's Purple Malachite/Slag Glass Vases

A pair of Victorian purple and white British pressed malachite / slag glass spill vases. Manufacturer unknown.

Victorian 1890's Purple Malachite/Slag Glass Vase

A Victorian purple and white British pressed malachite / slag glass vase. Manufacturer unknown.

Victorian 1890's Purple Malachite/Slag Glass Vase

A Victorian purple and white British pressed malachite / slag glass vase. Manufacturer unknown.

Victorian 1890's Purple Malachite/Slag Glass Bowl/Dish

A Victorian purple and white British pressed malachite / slag glass bowl. Manufacturer unknown.

Victorian 1890's Malachite/Slag Glass Toothpick Holder

A Victorian turquoise and white British pressed malachite / slag glass spill vase. Manufacturer unknown.

Victorian 1890's Malachite/Slag Glass Toothpick Holder

A Victorian purple and white British pressed malachite / slag glass spill vase. Manufacturer unknown.

Victorian 1890's Malachite/Slag Glass Pin Dish/Bowl

A Victorian purple and white British pressed malachite / slag glass pin dish. Manufacturer unknown.

Victorian 1890's Blue Malachite/Slag Glass Jug

A Victorian blue and white British pressed malachite / slag glass creamer jug. Manufacturer unknown.


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References

For more information on Malachite / Slag glass, check out the following resources:

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