[Jewelry making - Article 00025] - Re: [Orchid] Testing white metal

[John Donivan]

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>     a simple test for telling if a white-metal bead is nickel-silver or
>     pewter? 

    How about a couple? Nickel silver is white brass, and the brasses
    respond to nitric acid - that's probably your nasty little bottle.
    Pewter is tin, which responds to hydrochloric acid - concrete etch or
    swimming pool acid (muriatic) in the hardware store. Even easier is a
    scratch test. Pull out your pocket knife and scratch it - if it
    carves like soap it's either tin or lead or a combination of the two.

http://www.donivanandmaggiora.com
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