[Jewelry making - Article 01344] - Re: [Orchid] Agatized dinosaur bones

[Kevin P. Kelly]

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>     An agate is a particular stone. There are avid agate collectors
>     known as (droolers among dealers) world wide who would be upset
>     that dino bone would be called an agate. 

    Do you all remember the principle of "outlining" from grade school?
    The most general comes first, then subdivisions, and the
    subdivisions of those subdivisions. 

    Since my numerous references to John Sinkankas and his book "Gem
    Cutting" continue to be ignored I will paraphrase. 

    The most general heading for the material under discussion is
    'quartz', then there is 'crystalline' varieties and
    cryptocrystalline varieties and so on for a number of pages. One of
    the last entries 'Petrified Wood, Coral, etc. reads "When buried in
    the ground, some vegetable and animal remains are replaced by mineral
    substances, commonly calcite or chalcedony." 

    So the material that precipitated this discussion is a sub-variety of
    quartz and it is dino bone, but it doesn't fall under the quartz
    division of agate. 

    Thus ended the lesson. But perhaps not this thread. 

    I think we getting calcified; so keep those moving parts moving. 

KPK
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