[Jewelry making - Article 01379] - Re: [Orchid] Agatized dinosaur bones

[David Owen]

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    Most fossils are composed of minerals other than the original, there
    are exceptions but generally that is the case.I have seen petrified
    wood composed of agate, opal, limestone etc. I even have a piece
    partially replaced by malachite.The opalzied logs from the northwest
    are indeed opal which is what they are called. No one goes around
    saying this is not opal it is petrified wood. Agate is simply a form
    of silica that has replaced the original component or the spaces in
    between. Does it really matter if you call it dino bone, agatized
    dino bone, dino bone partially or completely replaced by agate or
    just plain dino bone? 

Dave Owen
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