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Tumble finishing
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Tumble finishing, also known as tumbling or rumbling, is a technique for smoothing and polishing a rough surface on relatively small parts. In the field of metalworking, a similar process called barre
Small rock tumbler with the barrel in place, ready to rotate
Small rock tumbler with the barrel in place, ready to rotate
Parts breakdown
Parts breakdown
A collection of gemstone pebbles. Most of these stones, except four rough ones, were tumbled and polished.
A collection of gemstone pebbles. Most of these stones, except four rough ones, were tumbled and polished.
Bridal crown made from pure tin and tumble polished rock crystals in 1984.
Bridal crown made from pure tin and tumble polished rock crystals in 1984.
Gemstone
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A gemstone is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments. Certain rocks and occasionally organic materials that are not minerals may also be us
Gemstone
A collection of gemstone pebbles made by tumbling the rough stones, except the ruby and tourmaline, with abrasive grit inside a rotating barrel. The l
A collection of gemstone pebbles made by tumbling the rough stones, except the ruby and tourmaline, with abrasive grit inside a rotating barrel. The largest pebble here is 40 mm (1.6 in) long.
Spanish emerald and gold pendant at Victoria and Albert Museum
Spanish emerald and gold pendant at Victoria and Albert Museum
Enamelled gold, amethyst, and pearl pendant, about 1880, Pasquale Novissimo (1844–1914), V&A Museum number M.36-1928
Enamelled gold, amethyst, and pearl pendant, about 1880, Pasquale Novissimo (1844–1914), V&A Museum number M.36-1928
A diamond cutter in Amsterdam
A diamond cutter in Amsterdam