Archaeological investigations at the site of Marco Gonzalez on Ambergris Caye, Belize have revealed a long, continuous occupation sequence extending from at least the Late Preclassic into the Late ...

The geochemistry of agate and chalcedony in volcanic rocks represents an intricate record of silica precipitation and crystallisation processes occurring under variable thermal and chemical conditions ...

Decorative arts and gem enthusiasts, delight: The Getty Museum has acquired 17 antique gems at auction—all of which will now be part of the collection of the Getty Villa, the museum's impressive Greco ...