A very rare, 21.52-carat Colombian “no oil” emerald-and-diamond ring will lead Phillips' sale of jewels and jadeite in Hong Kong next month, with a presale estimate of between HK$7.5 million and ...
A flawless Colombian emerald once owned by the legendary Rockefeller family sold during a Christie's auction for more than $5.5million Tuesday. The 18.04-carat emerald was purchased by famed jeweller ...
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