An Italian micro mosaic 'tondo' panel, depicting the Forum,…
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An Italian micro mosaic 'tondo' panel, depicting the Forum, Rome, possibly from the workshop of Biaggio Barzotti, third quarter 19th century, the circular panel depicting figures standing in the Roman Forum, the dome of St Peter's Basilica visible to the left side, within borders of malachite and black marble, housed within a carved and moulded composition and giltwood frame, 34.8 cm diameter (image). Provenance: Mr Neville Grace, Sydney. Private Collection, by descent from the above

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  • Malachite - Malachite is bright copper-green coloured stone with concentric layers which displays distinct contrasting veinings. It has been valued in the past for making or decorating small precious objects such as clocks, jewellery, dishes and so. In the Orient it was used for snuff bottles and in Russia and was favoured by the Faberge workshop. larger pieces were used for table tops.

    The principal source of supply was Russia but it is to be found in other regions such as Southern Africa, Mexico, Australia and France.

    Malachite glass is a manufactured material that was intended to resemble malachite, but often bears more resemblance to a veined coloured marble due to its lower gloss finish and lack of concentric layers. Malachite glass was manufactured by many glassworks in the 19th century including Loetz in Austria and others in Bohemia and Davidson's Greener's and Sowerby in north eastern England.

    It was particularly used for scent bottles, bowls, and small vases often decorated with nymphs.

    Malachite glass has been manufactured continuously since the late nineteenth century, most is unmarked and it is difficult to distinguish the age or manufacturer of most commercial pieces.
  • Giltwood - Giltwood is used to describe a gold finish on furniture and other decorative wooden items, whereby a thin sheet of gold metal, called gold leaf, is applied to the surface for decorative purposes.

    Unlike gilding, where the gold leaf is applied over a coating of gesso, with giltwood the gold leaf is applied direct to the surface, or over a coat of linseed oil gold leaf adhesive.

    Most gold-finished mirrors will be gilded, whereas furniture with gold highlights will have the gold applied through the giltwood method.

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