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  2. 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 ...

  3. 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 ...

  4. Sharpening stone - Wikipedia

    en.wikipedia.org/wiki/Sharpening_stone

    The term is based on the word "whet", which means to sharpen a blade, [3] [4] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.

  5. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  6. Why Granite Construction Shares Got Rocked and Then ... - AOL

    www.aol.com/2012/08/03/why-granite-construction...

    What: Shares of contractor Granite Construction. Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're ...

  7. Building material - Wikipedia

    en.wikipedia.org/wiki/Building_material

    Rock is a very dense material so it gives a lot of protection; its main drawback as a building material is its weight and the difficulty of working it. Its energy density is both an advantage and disadvantage.

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

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

    Jul. 5—CONCORD — It seems unthinkable that a time would come when the Granite State no longer produces granite. But last month, the last commercial granite quarry in New Hampshire was quietly ...

  9. Mohs scale - Wikipedia

    en.wikipedia.org/wiki/Mohs_scale

    Hardness may be difficult to determine, or may be misleading or meaningless, if a material is a mixture of two or more substances; for example, some sources have assigned a Mohs hardness of 6 or 7 to granite but it is a rock made of several minerals, each with its own Mohs hardness (e.g. topaz-rich granite contains: topaz — Mohs 8, quartz ...