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| Diatom frustules, polarising microscope |
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| Urea crystals from melt,polarising light |
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| Sulphur crystals from melt,polarised light |
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| Ascorbic acid crystals |
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| Crystals from melt of aspirin/phenacetin mixture. LM |
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| Bladder sand, polarizing light micrograph |
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| Vitamin C (ascorbic acid) crystals |
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| Crystalline ascorbic acid (vitamin C) |
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| Asparagine crystals, polarized light micrograph |
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| Citric acid, polarized light micrograph |
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| Crab louse (pubic louse), polarized light micrograph |
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| Dopamine crystals viewed with polarized light |
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| Fossil radiolarian |
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| Plant hairs, polarizing LM |
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| Paracetamol crystals, polarized light micrograph |
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