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phantom crystal

A crystal or mineral aggregate within which an earlier stage of crystallization or growth is outlined by dust, tiny inclusions, or bubbles; e.g., a trigonal scalenohedron of calcite coated with hematite and overgrown with a clear calcite rhombohedron in crystallographic continuity.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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