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  2. Allende meteorite - Wikipedia

    en.wikipedia.org/wiki/Allende_meteorite

    It is a "stony" meteorite, as opposed to an "iron," or "stony iron," the other two general classes of meteorite. Most Allende stones are covered, in part or in whole, by a black, shiny crust created as the stone descended at great speed through the atmosphere as it was falling towards the earth from space, causing the exterior of the stone to ...

  3. Stonesetting - Wikipedia

    en.wikipedia.org/wiki/Stonesetting

    The proper way to set a channel is to cut a notch for each stone, but for cheaper production work sometimes a groove is cut along each channel. Since the metal can be very stiff and strong, a reciprocating hammer, similar to a jackhammer but jewelry sized, may be used to hammer down the metal, as it can be difficult to do by hand. The metal is ...

  4. Granulation (jewellery) - Wikipedia

    en.wikipedia.org/wiki/Granulation_(jewellery)

    There are three basic techniques that may be used to attach granules to a metal surface: hard soldering, fusing and colloidal soldering. The metals used in granulation are usually gold and/or silver alloys of high purity – alloys below 18 kt. gold and sterling silver being unsuitable. With each technique, the process begins with the making of ...

  5. This watch was carved from a meteorite that hit Earth a ...

    www.aol.com/news/watch-carved-meteorite-hit...

    The reason may be, at least partly, price. Toledano declined to disclose how much the fragment used for the B/1M cost, but he noted that raw meteorite can sell for more, per gram, than gold.

  6. Carbonaceous chondrite - Wikipedia

    en.wikipedia.org/wiki/Carbonaceous_chondrite

    Carbonaceous chondrites or C chondrites are a class of chondritic meteorites comprising at least 8 known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4.6%) [1] of meteorite falls.

  7. Hedenbergite - Wikipedia

    en.wikipedia.org/wiki/Hedenbergite

    Hedenbergite has a number of specific properties. Its hardness is usually between five and six with two cleavage plains and conchoidal fracture. Color varies between black, greenish black, and dark brown with a resinous luster. Hedenbergite is a part of a pyroxene solid solution chain consisting of diopside and augite, and is the iron rich end ...

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    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!

  9. Engraving - Wikipedia

    en.wikipedia.org/wiki/Engraving

    Engraving is the practice of incising a design on a hard, usually flat surface by cutting grooves into it with a burin. The result may be a decorated object in itself, as when silver, gold, steel, or glass are engraved, or may provide an intaglio printing plate, of copper or another metal, [ 1 ] for printing images on paper as prints or ...

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