| 21. | But the clinchers were the amazing, heavy ankle bracelets set with onyx, citrine, amber and marcasite.
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| 22. | It forms in clay and lignite deposits as an oxidation product of pyrite and marcasite along with aluminium silicates.
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| 23. | The transition zone supergene sulfide phases include; violarite, smythite, covellite, chalcocite and marcasite after pyrite.
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| 24. | The gold deposit is a sediment-hosted disseminated sub-micron sized gold distributed in pyrite and marcasite.
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| 25. | However, the peels will degrade over time if they contain any iron sulfide ( pyrite or marcasite ).
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| 26. | This twin is very common in the marcasite of a chalky origin, particularly those from the Cap Blanc Nez.
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| 27. | It occurs associated with pyrite, marcasite, halotrichite, pickeringite, epsomite, potash alum, melanterite and gypsum.
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| 28. | They consist of metallic-appearing sulfides such as sphalerite, arsenopyrite, and marcasite embedded in opaque veins of quartz.
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| 29. | Marcasite also possesses homoatomic anion pairs, but the arrangement of the metal and diatomic anions is different from that of pyrite.
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| 30. | It also occurs as an alteration in argillaceous sediments or coal beds which contain oxidizing sulfide minerals ( pyrite or marcasite ).
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