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Siderite from
Coulee City Marina, Coulee City, Grant County, Washington, USA
| Classification | ||
|---|---|---|
| Species: | Siderite | |
| Formula: | FeCO3 | |
| Comments: | Lustre - sub-vitreous, silky likely weathered surfaces Color - Yellowish orange Streak - white Hardness - > 3 - < 4 presumed about 3.5 Cleavage - not tested (previous breaks appear to have good cleavage but since this is a crystal mass tests on individual crystals was not attempted) Brittle, breaks fairly easily and appears to have an irregular break on individual crystals Solubility - No reaction in cold HCl. Effervesces in hot acid and shows a distinct orange halo around the mineral. Complete dissolution in a few hours with no residue. This specimen was discussed at length in Mindat ID forum. It was believed to be stilbite but the complete dissolution (lack of silica gel residue) and the orangeish 'halo' around the piece as it dissolved (believed to be iron residue) showed this not to be stilbite. That coupled with the dirth of zeolite materials in the Columbia Flood Basalts show this to be siderite. | |
| Habit: | acicular (globular) platy looking with individual crystals curved (see photo) | |
| Colour: | Yellowish orange | |
| Luminescent properties: | Not tested | |
| Quality for species: | Good crystals or rich for species - important (!) | |
| Abundance at site: | Rare | |
| Special Storage/ Display Requirements: | None | |
| Confirmation | ||
| Validity: | Confirmed | |
| Confirmation Methods: | Wet Chemical | |
| Associated Minerals Based on Photo Data: | ||
| Calcite | 7 | |
| Goethite | 1 | |
| Siderite | 1 | |
| - var Sphärosiderite | 1 | |
| Data | ||
| Mineral Data: | Click here to view Siderite data | |
| Locality Data: | Click here to view Coulee City Marina, Coulee City, Grant County, Washington, USA | |
| Photo Gallery | View Gallery (3 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 953034 | |
| Long-form Identifier: | 1:3:953034:8 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Siderite | ||
| 10.1km (6.3 miles) | ⓘState Route 17 road cut [1], Coulee City, Grant County, Washington, USA | |
| 68.6km (42.6 miles) | ⓘPerch Point-Potholes Reservoir (Medicare Beach), Warden, Grant County, Washington, USA | |
| 70.8km (44.0 miles) | ⓘState Route 262 roadcuts, Warden, Grant County, Washington, USA | |
| 80.9km (50.3 miles) | ⓘLovitt Mine, Wenatchee Mining District, Chelan County, Washington, USA | |
| References | ||
Coulee City Marina, Coulee City, Grant County, Washington, USA