File:Dark crown.JPG

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English: Pleochroic halo around zircons enclosed in Biotit (the halo is due to the radiation damage caused by the radioactive dacay of element contained in the zircon structure). Punta aiunu, sardinia. Plane polarized light image image, magnification 20x (Field of view = 1mm)
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Author Strekeisen

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I, the copyright holder of this work, hereby publish it under the following license:
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Date/TimeThumbnailDimensionsUserComment
current13:15, 10 November 2015Thumbnail for version as of 13:15, 10 November 20153,456 × 2,304 (4.32 MB)Strekeisen (talk | contribs)User created page with UploadWizard

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