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<p>[QUOTE=&quot;abdel, post: 1061810, member: 4424&quot;]Three basic tests: led light. uv light. x ray</p><p>With led light must take yellowish color.</p><p>with uv light must make green color.</p><p>and x ray show you the layers of pearl formation.</p><p>I will post pictures later.[/QUOTE]</p><p><br /></p>

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