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 ...

Boulders of petrified wood, jade and quartz — each of them weighing about a ton — sparkle in the sun outside the Lizzadro Museum of Lapidary Art in Oak Brook. Tucked away in a suburban office park, ...

The Lizzadro Museum of Lapidary Art in Oak Brook has been displaying stone and gem works of art and teaching about the intricacies of engraving, cutting and polishing rocks and minerals for 60 years.

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 ...