All were named after precious jewels: eldest daughter Bi-chwi ("Jade"), eldest son San-ho ("Coral"), second daughter Ryu-bi ("Ruby"), and the youngest son, Ho-bak ("Amber").
Before the French Revolution much of the coral trade was centred in Marseille, but then largely moved to Italy, where the procuring of the raw material and the working of it was centring in Naples, Rome and Genoa.
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