地球宝藏：宝石 NOVA Treasures of the Earth: Gems 导演: Kate Dart, Doug Hamilton 主演:

类型：纪录片电影

简介:　　This program explains the formation, chemistry, variations and allure of the most notable gemstones; diamonds, emeralds, sapphires, rubies, jade and opals.

PBS前线：金钱，权力，华尔街 Money, Power & Wall Street 导演: 主演:Ryan Knutson, Will Lyman, Martin Smith

类型：纪录片电影

简介: