With a rainbow of colors to choose from, this stone is quietly taking its place in the top tier of gems.

In this first half of a two-part series, we explore some of the American Gem Trade Association’s key achievements.

The outside insider: The fine-jewelry brand’s first external CEO – who’s served in the role since August – shares her passions and proudest moments.

Recent moves by Rolex and others to consolidate the new- and used-timepiece markets have created uncertainty for independent dealers in the US and Europe.

From wartime plans to pizza promos.

Literary gems: Check out these five dazzling publications, perfect for presenting to your loved ones this season.

Author Ruth Peltason shows how the iconic jeweler’s works were in dialogue with the art and fashions of his era.

The senior specialist and director of fine jewelry and watches talks about her evolution from art history student to in-house jewel expert.

Diamonds rock the block: Blues, pinks and yellows studded the top lots at the season’s sales.

Keeping the green clean: Treating this precious stone is common in the industry. Five experts offer some clarity on the process.