A black opal cabochon set in a ring displays vivid orange play-of-color.

Reports on the recent production of precious and common opal from a centuries-old locality.

A newly developed treatment creates a phantom structure in opal visually similar to natural phantom opal.

At the AGTA show, we spoke with Natassa Patel, who along with her mother, Salma, owns and operates True Blue Opals and Gems.

Taking a look at the rough opal that plays a major role in the Adam Sandler film “Uncut Gems.” What is the real gemology and source information of opals?

A lyrical dance of bold, broad flashes of color or smaller, quicksteps of pinpoint flashes.

A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.

Jürgen Schütz discussed the opal sourcing and cutting activities of the German firm Emil Weis.

At the AGTA show, Rare Earth Mining Co. (Trumbull, Connecticut) displayed an unexpected material: Indonesian opal reportedly from West Java.

World-renowned jewelry artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.

Plans to develop a collective in a remote Brazilian rutilated quartz mining community are unveiled.