“The Modern Guide to Vintage Jewellery” follows the evolution of jewelry design from the ‘30s to the ‘80s with buying and styling advice.

Natalie Francisco

The nearly 7-carat fancy vivid purplish pink diamond could sell for around $9 million.

Lenore Fedow

The GIA’s new circular brilliant description was created to allay cut grade concerns among antique and estate diamond dealers. But it isn’t enough, some dealers say.

Michelle Graff