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Non Destructive Gold Assay


#1

Hi,

I am keen on knowing about any technology that helps is measuring
gold alloy without actually destructing the jewelry. I mean the NDT
for measuring gold. It should be portable and should have accuracy
for 2 decimals measuring gold content to 99.90 purity.

I really need such device if exists !

Thankyou

Rajeev Sheth
P Rajeev Jewellers
Mumbai,
India.


#2

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