Abstract
PYRITES (FeS2) in the form of small crystals and specks of a brassy-yellow colour may be found frequently in quartz. Four pieces of Brazilian quartz, containing pyrites inclusions, have now been found which are of unusual interest.
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BRECH, F. Pyrites in Quartz. Nature 135, 917 (1935). https://doi.org/10.1038/135917a0
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DOI: https://doi.org/10.1038/135917a0