[Jewelry making - Article 00661] - Re: [Orchid] A dark stain on a gold ring

[RING14K]

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    My experience tells me that either a filled pit, porous cavity or a
    microscopic breakdown of a portion of  the alloy as there was either
    as contaminated wax of some flux got trapped during the pour. All
    these can be affected later by exposure to bleach and other
    household chemicals.   Ringman John Henry 



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