Berylde John SinkankasMateriasBerylEdiciones (2)Beryl (1986)Butterworths · inglésBeryl (1986)Elsevier Science & Technology Books · inglés · ISBN 9781483101231Más obras de John SinkankasEmeraldPProspecting for Gemstones and MineralsProspecting for Gemstones and MineralsMMineralogy for Amateurs, Line Drawings and Diagrams By the AMineralogy for Amateurs, Line Drawings and Diagrams By the Author
MMineralogy for Amateurs, Line Drawings and Diagrams By the AMineralogy for Amateurs, Line Drawings and Diagrams By the Author
AA bibliography of North American gemstone liteatureA bibliography of North American gemstone liteature
