Splendid StonesDVD - 2010
A discussion of diamonds, pearls, emeralds, rubies, and sapphires--how they are mined, made by man, and the businesses involved from production to the sale of a cut gemstone.
Publisher: [Washington, D.C.] : National Geographic Society, 
Branch Call Number: DVD 553.8 S761
Characteristics: 1 videodisc (56 min.) : sd., col. with b&w sequences ; 4 3/4 in