Crednerite from
Torr Works Quarry, Cranmore, Mendip, Somerset, England, UK
| Locality type: | Quarry | |
| Classification | ||
|---|---|---|
| Species: | Crednerite | |
| Formula: | Cu+Mn3+O2 | |
| Comments: | Invariably embedded in calcite, very rarely as free standing crystals. Crednerite is usually covered by an oxidation coating of malachite. Has been recently (2006-06) found replaced by kentrolite. 'Crednerite' has recently been found to be a mixture of at least three, possibly four different phases (see Turner and Rumsey 2010). Two of these predominate in the Mendips. In addition, there are a number of alteration phases that are derived from 'crednerite'. These various phases need further investigation, and proper characterisation. | |
| Habit: | Massive, bladed, platy in calcite | |
| Colour: | Very dark green to black | |
| Luminescent properties: | none | |
| Quality for species: | Excellent - world class for species or very significant. (!!) | |
| Abundance at site: | Rare | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Associated Minerals Based on Photo Data: | ||
| Calcite | 12 | |
| - var Manganese-bearing Calcite | 1 | |
| Mendipite | 11 | |
| Malachite | 10 | |
| Cerussite | 10 | |
| Chloroxiphite | 7 | |
| Mereheadite | 7 | |
| Hydrocerussite | 2 | |
| Diaboleite | 1 | |
| Quartz | 1 | |
| Goethite | 1 | |
| Paralaurionite | 1 | |
| Cryptomelane | 1 | |
| Data | ||
| Mineral Data: | Click here to view Crednerite data | |
| Locality Data: | Click here to view Torr Works Quarry, Cranmore, Mendip, Somerset, England, UK | |
| Photo Gallery | View Gallery (9 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 15684 | |
| Long-form Identifier: | 1:3:15684:0 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Crednerite | ||
| 3.2km (2.0 miles) | ⓘColemans Quarry, Nunney, Mendip, Somerset, England, UK | |
| 16.6km (10.3 miles) | ⓘHigher Pitts Mine, Priddy, Mendip, Somerset, England, UK | |
| 35.8km (22.2 miles) | ⓘWesley Mine, Westbury on Trym, Bristol, England, UK | |
| References | ||
Torr Works Quarry, Cranmore, Mendip, Somerset, England, UK