Agate, polarised light micrograph

Agate, polarised light micrograph

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Credit: STEVE LOWRY/SCIENCE PHOTO LIBRARY

Caption: Polarised light micrograph of a thin section of agate from Blue Hole, Usan, Montrose, Scotland. Agate is a form of fine grained microcrystalline quartz. This image shows banded layers of chalcedony. Although agate can be found in a range of rock types it is predominantly associated with metamorphic rock. It is a brightly coloured, banded, semi-precious gemstone which is the birth stone for Gemini. Magnification: x14 at 10cm wide.

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Keywords: agate, birthstone, blue hole, chalcedony, gem, gemini, gemstone, geological, geology, light micrograph, metamorphic, microcrystalline quartz, microscope, microscopic, microscopy, mineral, minerology, polarised, polarized, quartz, scotland, thin polished section, usan

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