Paul Black explained how Mount Diablo was formed by lava squirting “like toothpaste” through layers of rock while he polished a piece of Woodward Ranch Plume Agate. He was yelling. The decibels were ...

ANTIOCH — As he polished a piece of Woodward Ranch plume agate, Paul Black explained how Mount Diablo was formed by lava squirting “like toothpaste” through layers of rock. He was yelling. The ...

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Regina and Jill Collins have been enjoying mother-daughter outings to the Lizzadro Museum of Lapidary Art for about 10 years. Regina, who was interested in polished rocks, first took her daughter, now ...

CHILDREN had the opportunity to learn the art of lapidary at a recent school holiday workshop.