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<p>[QUOTE=&quot;Any Jewelry, post: 359652, member: 2844&quot;]Years ago I bought a complete kit, including solutions for testing different gold finesses and platinum, and a stone. Now I just buy silver solution separately to replace the old one. Usually from Bulgaria. (I am your neighbour to the north, NL)</p><p><br /></p><p>The stone is unglazed black porcelain. The liquid is based on nitric acid. Here is a video on how to make your own silver testing solution:</p><p>[MEDIA=youtube]KfpOC7Ah2-s[/MEDIA][/QUOTE]</p><p><br /></p>

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