A very complete reference work covering the period 1840 to 1950, with prices updated for 1999. There are over 1,700 large, sharp, black and white photos and 32 page full color sections with superior, sharp, large photos. The 3 major sections are: When was it made and what is it worth?; 100 Years of Cameos; and Manufacturing Techniques. Each section is loaded with photos and information. It tells how jewelry is made, how to determine what kind of metal an item is made from, determining whether a stone is synthetic, a listing of maker's marks to help you identify and date pieces. A complete glossary is included. A must have book for the jewelry collector !