Jewelers of America (JA) chief financial officer will succeed Terry Chandler in role.
A pair of pearl and diamond earrings fetches more than 23 times expected price.
She led the department from 2009 to 2014.
Sara Yood, Raja Shah and Mélanie Matthes join organization.
Institute will now sort submissions into five separate classifications.
Miner sells 1.5 million carats, accounting for 94% of lots.
Fancy-vivid-pink ring will be among top pieces at May 22 sale.
Company also owns the Braúna deposit in Brazil.
Figure up 0.1% in April, according to US Census Bureau.
Figure for division up 8%, with growth in all regions except Asia Pacific.

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