[Jewelry making - Article 01506] - Re: [Orchid] Polishing agatized dinosaur bones

[Todd Goodwin]

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    There are some materials in the Lapidary trade that just don't care
    to be polished the way we want them to be polished. Lapis Lazuli is
    one of them. Dinosaur Bone is another one of those materials that
    hate to play the way we wish them too. Because Dino Bone is composed
    of calcite, trace chalcedony, calcium, etc, it has areas of differing
    hardnesses. What this means to us is one area will polish with an
    agent while the very same agent cuts another. Undercutting. Eggshell.
    Pits. (If you or anyone else discovers a way to prevent this from
    occurring without the use of impregnating agents, please let us
    know.) 

    BTW, it sounds like you are using Red Rouge. Rouge is too aggressive
    and it too easily can stain. Try cerium oxide on leather. 

    (And Now, tossing in my Two Cents on the related debate: Most of the
    Dinosaur bone on the market is from the Moab, Utah area. This
    material is not petrified or opalized. Nor is it psudomorphed. Not
    sure of it's origins entirely, but I do know this; There are examples
    of petrified [Agatized] and opalized dinosaur bones in existence.
    Chances are we will not be able to cut them unless found abroad.
    Utah, and some other states, allow collection of vertebrate fossils
    from private land, and private land only. All other domestic [US]
    material is property of the federal government and is protected. Now
    if they find suitable material elsewhere and can sell it, fine. My
    point is the material we know and use comes from one small speck in
    the map. Once another source emerges with differing characteristics
    a new debate will be sparked on nomenclature. "Dinosaur Bone" sounds
    fine to me.) 

TL Goodwin
http://www.thepacifikimage.com
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