[Jewelry making - Article 00055] - Re: [Orchid] Non Destructive Gold Assay

[Ian W. Wright]

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Hi Rajeev,

    The only method I know which will do what you want is an X-ray
    diffraction technique. The Sheffield Assay Office has a machine for
    doing this but it is definitely not portable and looks for all the
    world like an office photocopier about 600mm square and 1 metre high.
    There may, of course be miniaturised versions available - I don't
    know. The only problem with this type of technique is that it only
    measures the surface metal and so can be fooled by plating or surface
    enrichment.

Best wishes,
Ian
Ian W. Wright
SHEFFIELD UK
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