Originally Posted by
Dennis
I think the answer is that ready made bezel cups don't always lend themselves to an airtight setting, so liquid and airborne pollutants can seep in.
This is more obvious with very translucent stones.
A good reason for cutting away most of the back plate before setting the stone and just leaving a narrow bearer. Then when the piece becomes tarnished, as is natural for silver, a quick dip in a dipping solution and then a prolonged rinse will deal with the problem. Dennis.
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