Firescale

firescale shop_online_with_stone_mania

Firescale is a smokey brown coloured stain which can sometimes appear on sterling silver while it's being worked on at very high temperatures, for example whilst it's being soldered. Firescale looks very similar to a tea stain and is caused because of a reaction between the oxygen in the atmosphere and the copper that's present in the silver alloy.

 

 

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