This is the 3-volume set by the renowned Gemologist Jerry Sisk. Originally marketed through JTV it has gone out of print since Mr. Sisks untimely death. Each volume was available individually or you could purchase the set. Each volume is shrink wrapped for protection with only volume one being opened for inspection. Other then this they remain in like new condition. Volume 1 is Prominent Gems, volume 2 is Gallery of Gems and volume 3 is Noteworthy Gems. This set is a must for a beginning to an established Gemologist as the photograph is stunning. Includes all necessary identification criteria to determine Gem identification.