The Mexican boulder opals they had on display were such an example. These specimens are cut to include both opal and rhyolite matrix, which some jewelry designers like to use in their pieces.

Discover hidden gem restaurants across the U.S. that locals love and travelers dream about—unique spots that serve ...

FAVOURITE GEMSTONE: Green emerald. FAVOURITE METAL: 18-carat yellow gold. FAVOURITE TOOL: Ring clamp. BEST NEW TOOL DISCOVERY: Laser welder. BEST PART OF THE JOB: Working on and seeing many styles of ...

Seven people have been indicted for their alleged involvement in what has been described as the largest jewellery theft in the history of the US.