19th Century French Hardstone Mantle Urn with Ormolu Mounts
An ornamental mantle urn, hardstone with ormolu mounts, French, 19th century
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- Hardstone - Hardstone is not a scientific name for a particular gemstone, but a word used to describe any one or more semi-precious stones used in jewellery and decorative arts, and can include jade, agate, onyx, rock crystal, amber, jet and carnelian. Softer stones and minerals such as soapstone, and alabaster and hard stones used in building such as marble or granite are generally excluded.
- Ormolu - Ormolu was popular with French craftsmen in the 18th and 19th century for ornamental fittings for furniture, clocks and other decorative items. True ormolu is gilt bronze, that is bronze that has been coated with gold using a mercury amalgam. Due to the health risks associated with using mercury, this method of creating ormolu was discontinued in France in the 1830s. A substitute was developed consisting of about 75% copper and 25% zinc, however it was inferior to the bronze version. It was often lacquered to prevent it tarnishing.
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