| A few sharp rhombic crystals of rhodochrosite without siderite coating were also found in the Eagle mine. |
| The unoxidized sections consist primarily of marmatite ore, which is composed primarily of pyrite, marmatite, galena, siderite, and minor chalcopyrite. |
| They noted that in the Champion mine siderite is abundant, occurring as the chief gangue mineral of the sulfide ores in the dolomitic beds in the Sawatch Quartzite. |
| Gilman pyrites typically have associated minerals, particularly flattened siderite rhombohedra and marmatite. |
| Both siderite and massive pyrite were mapped as noncommercial iron ore by the Eagle mine staff. |
| Other carbonates, i.e., ankerite, siderite, witherite, strontianite, may form if the respective metal cations are available. |
