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  2. Stone sculpture - Wikipedia

    en.wikipedia.org/wiki/Stone_sculpture

    The hardest stone frequently carved is granite, at about 8 on the Mohs scale. It is the most durable of sculptural stones and, correspondingly, an extremely difficult stone to work. [2] Basalt columns, being even harder than the granite, are less frequently carved. This stone takes on a beautiful black appearance when polished.

  3. Granite - Wikipedia

    en.wikipedia.org/wiki/Granite

    Granite is a hard stone and requires skill to carve by hand. Until the early 18th century, in the Western world, granite could be carved only by hand tools with generally poor results. A key breakthrough was the invention of steam-powered cutting and dressing tools by Alexander MacDonald of Aberdeen , inspired by seeing ancient Egyptian granite ...

  4. Stone carving - Wikipedia

    en.wikipedia.org/wiki/Stone_carving

    The development of iron made possible stone carving tools, such as chisels, drills and saws made from steel, that were capable of being hardened and tempered to a state hard enough to cut stone without deforming, while not being so brittle as to shatter. Carving tools have changed little since then.

  5. Decomposed granite - Wikipedia

    en.wikipedia.org/wiki/Decomposed_granite

    Decomposed granite is a kind of granite rock that is weathered to the point that the parent material readily fractures into smaller pieces of weaker rock. Further weathering yields material that easily crumbles into mixtures of gravel -sized particles known as grus that further may break down to produce a mixture of clay and silica sand or silt ...

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  7. Sigiriya - Wikipedia

    en.wikipedia.org/wiki/Sigiriya

    It is a site of historical and archaeological significance that is dominated by a massive column of granite approximately 180 m (590 ft) high. [ 2 ] According to the ancient Sri Lankan chronicle the Cūḷavaṃsa , this area was a large forest, then after storms and landslides it became a hill and was selected by King Kashyapa (AD 477–495 ...

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  9. A hard stop: New ownership closes Concord's Swenson Granite ...

    www.aol.com/hard-stop-ownership-closes-concords...

    Swenson Granite retail shops will remain open, and the curb-cutting operation in Concord continues to do a profitable business. But the quarrymen are gone. 'It was hard work'