| Locality type: | Quarry |
| Classification |
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| Species: | Pumpellyite-(Mg) |
| Formula: | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Formation: | Secondary |
| Comments: | Based on the chemical formula given in Garabedian (1998), the species is pumpellyite-(Mg). Few specimens have been confirmed by analyses to differentiate it from several other possible pumpellyite group minerals. One of the first minerals to crystallize in vesicles, so is typically present between later minerals and the basalt matrix, a second stage crystallization came after early calcite, anhydrite, chalcedony, a trapezohedral zeolite, and datolite and so may coat or replace these minerals. May by itself fill entire vesicles. |
| Habit: | fibrous micro-crystals |
| Colour: | dark olive green |
| Quality for species: | Good crystals or rich for species - important (!) |
| Abundance at site: | Very common |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Prehnite | β2 photos of Pumpellyite-(Mg) associated with Prehnite at this locality. |
| Apophyllite Group | β1 photo of Pumpellyite-(Mg) associated with Apophyllite Group at this locality. |
| Data |
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| Mineral Data: | Click here to view Pumpellyite-(Mg) data |
| Locality Data: | Click here to view O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA |
| Photo Gallery | View Gallery (2 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 752716 |
| Long-form Identifier: | 1:3:752716:6 |
| GUID (UUID V4): | a81ad6eb-62f8-4e67-91e1-087ba08581fb |
| References |
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O & G Southbury Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA