The photos are few, but the information is worth the few images.
These stones must be given 'extra' space' on the four corners, why is this? Remember that there is "6% shrinkage" taking place on every metal casting.
This 'shrinkage' occurs on every aspect of the width, length and depth and everywhere on the new ring.
Never assume that your stones will fit exactly into the new wax. There must be adequate space in the wax, for this overall shrinkage.
When you find the correct size of stones, always make an extra effort in drilling for more space. Every 'model-maker' or CAD designer makes allowances for this "6% shrinkage" equation. If the person casts the ring without this equation, the new ring will squeeze the stones and they will be literally ruined.
The only solution is to create the ring to your "increased 6%" specifications and then set the stones afterwards. After the casting process, the ring will then match the size of these delicate & fragile stones.
In my limited number of photos on this topic, I'm trying to cover this problem as best as I can.
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