| 21. | It is part of the chalcopyrite group and forms a series with chalcopyrite.
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| 22. | It is part of the chalcopyrite group and forms a series with chalcopyrite.
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| 23. | Between Bonao and Maimon, supergene zone containing pyrite, chalcopyrite, and sphalerite.
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| 24. | Associated minerals include arsenopyrite, stannoidite, chalcopyrite, chalcocite, sphalerite and tennantite.
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| 25. | Pyrite and chalcopyrite are present in small amounts.
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| 26. | Other products from the mine are chalcocite, chalcopyrite, galena, and sphalerite.
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| 27. | They are commonly at the edge and partially enclosed by pentlandite, pyrrhotite or chalcopyrite.
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| 28. | Cubanite occurs in high temperature hydrothermal deposits with pyrrhotite and pentlandite as intergrowths with chalcopyrite.
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| 29. | On exposure to air, chalcopyrite oxidises to a variety of oxides, hydroxides and sulfates.
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| 30. | It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite, barite and marcasite.
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