* Photo: Corbis * Getting a perfect diamond or ruby from a raw stone has always been more art than science. Each gem must be meticulously cut and polished by hand. The problem: It can take up to four ...

Rubies, emeralds and tourmalines can only sparkle with the right cut. Since early this year, a fully automatic machine has undertaken this grinding process one gem cutter. It saves up to 30 percent of ...

TUCSON (KGUN9-TV) - The Tucson Gem, Mineral, and Fossil Showcase is off and running for its 62nd year, many of the 45 shows opening Saturday. "This is the premier location for the display and sale of ...

A diamond-embedded lapidary polishing wheel allows gem cutter Bob Hancock to carve into rough bits of quartz and transform them into sparkling gems. Even with this super-hard polishing surface — and ...

Ever wonder what makes a gemstone sparkle? It’s all in the faceting! Ever wonder what makes gemstone sparkle? It starts with the way a crystal reflects and refracts light. Gemstone cutters must choose ...