[Jewelry making - Article 00057] - Re: [Orchid] Rothelium

[Rick Hamilton]

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    If you are looking for a metal that has a truly black color you
    might want to try heat oxidizing niobium. The pent-oxide of
    niobium is a very dark charcoal color and can be burnished to a
    nice luster.If you matt finish the niobium before heating it, the
    finish is a soft light absorbing black. 

    The iron based gold alloys that I have seen are lighter in color
    and bluish- similar to tantalum. 

Rick Hamilton
Rick 


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