Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, ...

The film focuses on a series of hunger strikes organized by those incarcerated at California’s Pelican Bay State Prison, in protest of conditions in highest-security prisons. By Alissa Wilkinson ...

Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, rubies, and emeralds. Semi-precious stones are evaluated on their rarity ...

63.5 x 50.5 cm. (25 x 19.9 in.) ...

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...