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This stone, composed of Whewellite, which originated in urinary bladder, is called Jack‘s stone. Why? Mrs. Sue Haysom gave me the answer to this question. She sent me this snap of Jack from her childhood time. Do you know this game? In German language the name of this stone is Morgen Stern.
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| calculi@calculi.cz | Calculi 2004 | by bb |
