Volcanic ash from the 2011 Merapi eruption sent by James Reynolds, collected October 30 close to Merapi in Indonesia.
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Zeiß Images. The ash was disolved in siliconoil, water or alcohol to avoid the building f tiny heaps because this ash was rather magnetic. The magnification is 100, 200 or 400 fold. Different light channels were used.
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Hirox ( reflecting light microscope) images
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