Metals and Minerals – Page 7

A Gem in Shades From Shamrock to Sage Takes the Spotlight

Eighteen jewelry designers create pieces featuring unusual copper-rich green tourmalines.

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Mineral deposits can create markings that look like forests or mountains, and experts say each stone is distinctive.

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The move comes a day after the Biden administration expanded curbs on the sale of advanced American technology to China.

By David Pierson

Bold gold pieces are trendy, but makers worry that the steep price increases for the precious metal will soon deter demand.

By Sam Bush for The New York Times