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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. 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.

  4. 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 ...

  5. 90 Scary Easy Carving Ideas for Your Best Halloween ... - AOL

    www.aol.com/lifestyle/80-scary-easy-carving...

    Easy Halloween pumpkin carving ideas can look impressive. Get out your carving tools and use our stencils and tutorials to make cool, creative jack-o'-lanterns. 90 Scary Easy Carving Ideas for ...

  6. Construction of the Egyptian pyramids - Wikipedia

    en.wikipedia.org/wiki/Construction_of_the...

    The stones forming the core of the pyramids were roughly cut, especially in the Great Pyramid. To fill the gaps, huge quantities of gypsum and rubble were needed. [7] [8]: 72, 80 The filling has almost no binding properties, but it was necessary to stabilize the construction. To make the gypsum mortar, it had to be dehydrated by heating which ...

  7. Why Granite Construction's Shares Plunged - AOL

    www.aol.com/2013/02/28/why-granite-constructions...

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  8. 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 ...

  9. Joint (geology) - Wikipedia

    en.wikipedia.org/wiki/Joint_(geology)

    The vertical, gravitational load of the mass of a mountain-size bedrock mass drives longitudinal splitting and causes outward buckling toward the free air. In addition, paleostress sealed in the granite before the granite was exhumed by erosion and released by exhumation and canyon cutting is also a driving force for the actual spalling. [2] [9]