Erythrite from
Great Hill cobalt mines, Cobalt, East Hampton (Chatham), Middlesex County, Connecticut, USA
| Locality type: | Mine | |
| Classification | ||
|---|---|---|
| Species: | Erythrite | |
| Formula: | Co3(AsO4)2 · 8H2O | |
| Comments: | Formed from the weathering of Co-rich loellingite. "Eugene Franckfort reported that the face of one lode, opened more than a century ago, was covered with, abundant erythrite crystals… as fine as any which he had seen in his native Europe." (Schooner 1958). "The Francfort mineral collection [at Wesleyan University] contains some excellent samples of erythrite from Bucks Shaft" (Gray 2005). It was common during the mining, but very scarce now. A small flake was tested in concentrated HCl and it turned the solution blue, indicating erythrite. | |
| Habit: | earthy incrustation or delicate needles | |
| Colour: | red | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Associated Minerals Based on Photo Data: | ||
| Löllingite | ⓘ8 photos of Erythrite associated with Löllingite at this locality. | |
| Quartz | ⓘ4 photos of Erythrite associated with Quartz at this locality. | |
| Scorodite | ⓘ1 photo of Erythrite associated with Scorodite at this locality. | |
| Data | ||
| Mineral Data: | Click here to view Erythrite data | |
| Locality Data: | Click here to view Great Hill cobalt mines, Cobalt, East Hampton (Chatham), Middlesex County, Connecticut, USA | |
| Photo Gallery | View Gallery (2 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 102044 | |
| Long-form Identifier: | 1:3:102044:1 | |
| GUID (UUID V4): | 8fc66bbc-c5f4-4300-a2b2-a43d50b5aafc | |
| Nearest other occurrences of Erythrite | ||
| 51.1km (31.7 miles) | ⓘState Routes 8 and 118 interchange, Harwinton, Litchfield County, Connecticut, USA | |
| 65.1km (40.5 miles) | ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA | |
| 92.8km (57.7 miles) | ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA | |
| References | ||
Great Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA