The gemological properties of a new ruby imitation, produced by dyeing natural colorless to pale-colored corundum, are described.

Northern Vietnam began producing significant quantities of rubies and fancy sapphires in the late 1980s.

The history of Baja California has been closely tied to the exploitation of pearls since the 16th century.

An extraordinary 236.27 ct morganite from Madagascar stands out at the GJX show.

The history and mysteries behind a treasure of jewels hidden during the 1600s, a window to the past being fully opened to the public for the first time since a chance discovery a century ago.

Several gems were recently examined that showed stars with an unnatural appearance or an unusual number of rays.

Known for their great beauty and rarity, pink diamonds have long been sought after by jewelers, collectors, and consumers.

The stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.

A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.

An emerald deposit at Byrud, in southern Norway, yielded significant quantities of crystals and gem rough in the late 19th and early 20th centuries.