| Classification |
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| Species: | Johannsenite |
| Formula: | CaMn2+Si2O6 |
| Comments: | Fibrous tan or gray johannsenite is intergrown with pink bustamite in a few specimens from the Jail Hill quarry. The X-ray pattern indicates a clinopyroxene, and spectrographic analysis shows calcium and manganese as the principal cations of both minerals. The association is entirely characteristic. |
| Colour: | tan or gray |
| Quality for species: | Poor for species, only of interest for locality collectors. (#) |
| Abundance at site: | Very Rare |
| Confirmation |
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| Validity: | Unconfirmed/Questioned |
| Data |
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| Mineral Data: | Click here to view Johannsenite data |
| Locality Data: | Click here to view Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 828334 |
| Long-form Identifier: | 1:3:828334:4 |
| GUID (UUID V4): | 5664e496-50c8-448f-8017-ec1e718b7742 |
| References |
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