Here again is the fascinating world of marbles, newly revised. Indians, Aggies, Steelies, and more.every major category of marble is presented in this new and exciting guide. Included are old handmade marbles of glass, earthenware, minerals, and steel; machine-made marbles and their manufacturers; and contemporary handmade glass marbles by artisans recapturing the old styles and creating exciting new styles all their own. Marble pricing is explained in detail. The author describes the four factors to look for when determining the value of a marble, and presents an accurate guide to today's market. AUTHOR: Robert Block has been collecting, appraising and dealing in marbles for many years. He has spoken to numerous historical societies and marble meets, and runs live marble auctions and marble shows.