| The south sea that I saw was around 8.5mm. What's the smallest nucleus typically used in south seas? 6mm?
In akoyas, it is plausible to attribute the luster to treatment for thin- nacred pearls. I understand that a thinner side than the other is typical in pearls esp. baroques, but the current lack of standard for nacre thickness in south seas concerns me about the durability of the product.
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