File:Oil Spot glaze thin section 2 ppl.jpg

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English: Crystals formed during production of a Song Dynasty “oil spot” glaze on a ceramic tea bowl, as seen in a petrographic thin section under transmitted plane polarized light. The feather/petal structures are formed of colorless anorthite (a calcium-aluminum silicate), and brown iron oxides line those structures and fill in the spaces between them. Some round, colorless quartz remnants are also visible; the one in the upper right has converted to a high-temperature form of silica, cristobalite, with tiny tile structures covering the crystal. Viewed under a Nikon Eclipse 50i POL microscope, captured with a QImaging MicroPublisher 5.0 RTV CCD camera.
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Author Chandra L. Reedy

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current03:14, 15 December 2023Thumbnail for version as of 03:14, 15 December 20232,560 × 1,920 (3.01 MB)Chandra L. Reedy (talk | contribs)Uploaded own work with UploadWizard

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