| 摘要 |
PROBLEM TO BE SOLVED: To provide a marble containing an iron core having impact resistance higher than that of a conventional marble of glass which enables a play using magnets to easily enhance ornamentity and which has the same weight as that of a spherical body of glass with the same diameter. SOLUTION: The marble containing the iron core 1 of a perfect spherical body is constituted by covering the whole outer surface of the iron core 2 with a synthetic resin outer skin 3, and further has the same size and weight as that of the conventional marble of glass. COPYRIGHT: (C)2007,JPO&INPIT
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