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Calcite from
Coulee City Marina, Coulee City, Grant County, Washington, USA
| Classification | ||
|---|---|---|
| Species: | Calcite | |
| Formula: | CaCO3 | |
| Comments: | Lustre - waxy, pearly Color - yellowish (translucent) Streak - white Hardness - ~3 Cleavage - none attempted Fracture - none attempted but along existing break lines appears brittle and sub-conchoidal (see photo) Solubility - effervesces readily even with common household vinegar (did not test further for total solubility) Combination of tests and physical habit show this to be calcite. There is a dirth of zeolite material from the Columbia Flood Basalts which further leads one to a determination of calcite. This specimen was well discussed on a Mindat ID thread. It was thought that it was 'most likely' Stilbite on prehnite with sphalerite. Chemical testing showed the outer material to dissolve slowly, releasing some effervescence, in hot HCl, but showed no effervescing reaction in cold HCl. No silica gel was noted after completely dissolving. The inner crystal reacted instantly to cold HCl bubbling vigorously and was much too soft to be prehnite. That, coupled with the dirth of zeolites within the Columbia Flood Basalts, shows that this is most likely siderite, which I believe to be a good ID, while the inner globular crystal is most likely calcite. | |
| Habit: | acicular (globular) | |
| Colour: | Yellowish white | |
| Luminescent properties: | None attempted | |
| Abundance at site: | Rare | |
| Special Storage/ Display Requirements: | N/A | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Associated Minerals Based on Photo Data: | ||
| Siderite | 7 | |
| Goethite | 3 | |
| Aragonite | 1 | |
| Data | ||
| Mineral Data: | Click here to view Calcite data | |
| Locality Data: | Click here to view Coulee City Marina, Coulee City, Grant County, Washington, USA | |
| Photo Gallery | View Gallery (18 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 953035 | |
| Long-form Identifier: | 1:3:953035:5 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Calcite | ||
| 8.3km (5.1 miles) | ⓘWashington State Route 155 [Coulee Boulevard] unnamed glacial bar, Coulee City, Grant County, Washington, USA | |
| 21.9km (13.6 miles) | ⓘBurlington Northern-Santa Fe Railroad Bed-Stratford, Grant County, Washington, USA | |
| 24.7km (15.4 miles) | ⓘSouth End Lake Lenore, Soap Lake, Grant County, Washington, USA | |
| 27.2km (16.9 miles) | ⓘState Route 28 road cuts, Soap Lake, Grant County, Washington, USA | |
| 46.6km (29.0 miles) | ⓘDouglas Creek, Douglas County, Washington, USA | |
| 62.2km (38.7 miles) | ⓘLast Chance Mine, Mount Tolman Deposit, San Poil Mining District (Keller Mining District), Ferry County, Washington, USA | |
| 62.8km (39.0 miles) | ⓘLittle Chief Mine, Nespelem Mining District, Okanogan County, Washington, USA | |
| 62.8km (39.0 miles) | ⓘCougar Prospect, Mount Tolman Deposit, San Poil Mining District (Keller Mining District), Ferry County, Washington, USA | |
| 63.9km (39.7 miles) | ⓘCabin Shaft, Nespelem Mining District, Okanogan County, Washington, USA | |
| 63.9km (39.7 miles) | ⓘTip Top Prospect, Nespelem Mining District, Okanogan County, Washington, USA | |
| References | ||
Coulee City Marina, Coulee City, Grant County, Washington, USA