[Jewelry making - Article 00112] - Re: [Orchid] Agatized dinosaur bones

[Todd Goodwin]

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    Cryptocrystalline quartz 

    Aventurine 

    Chalcedony 

    Agate (Any transparent or translucent chalcedony not called
    Chalcedony) 

    Chalcedony (Any agate like material that is white, blue or gray).

    Jasper (any opaque agate-like chalcedony). 

    Chalcedony nomenclature is colloquial and not scientific. I grew up
    hunting for Ellensburg Blue Agate which is a Chalcedony and
    Chalcedony proper but is called an agate. Carnelian is often a solid
    color and is an Agate Chalcedony. Agate does not have to have bands
    to be called agate (fortification agate if banded). I find a lot of
    Jasp/Ag (jasper/agate mix) that is also a Chalcedony. The material
    lining Amethyst Cathedrals from Brazil is Chalcedony, not agate
    (solid blue-grey translucent).

    Most Dinosaur Bone comes from the Moab, Utah area, to the best of my
    knowledge. This material is most likely mostly calcite with trace
    chalcedony and maybe some opal. I don't know. I'm not a scientist,
    just a cutter. I do suspect that fully fossilized bones have been
    found in the world, as well as opalized remains. Just not from Moab.
    Any organic matter that has been replaced my chalcedony is called
    "fossilized". Any matter replaced my opal is "opalized". We might
    just say that dinosaur bone has been "preserved". In my opinion I
    would think "Dinosaur Bone" would be enough to call the material
    because we all agree that's what it is. 

    This material does not cut like any of the Chalcedonies. I suspect
    it isn't. 

TL Goodwin
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