The materials covered in the book include Amber and Copal; Jet; Ivory; Bone; Antler; Rhino horn; Horn; Tortoiseshell; Pearl; Shell; Coral, and other materials of plant and animal origin that have been used as gem or ornamental material.
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The materials covered in the book include Amber and Copal; Jet; Ivory; Bone; Antler; Rhino horn; Horn; Tortoiseshell; Pearl; Shell; Coral, and other materials of plant and animal origin that have been used as gem or ornamental material.
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