| Locality type: | Quarry |
| Classification |
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| Species: | 'Pumpellyite Subgroup' (not an IMA approved species) |
| Formula: | Ca2XAl2[Si2O6(OH)][SiO4](OH)2A |
| Comments: | Micro crystals idendified by Fred Schaefermeyer,noted micromineralogist from Virginia. Collected by Brander Robinson 1995 |
| Habit: | Narrow plates flattened |
| Colour: | dark greenish black |
| Luminescent properties: | none |
| Quality for species: | Poor for species, only of interest for locality collectors. (#) |
| Abundance at site: | Rare |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Associated Minerals Based on Photo Data: |
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| Prehnite | 6 |
| Laumontite | 6 |
| Fluorapophyllite-(K) | 3 |
| Epidote | 3 |
| Hydroxyapophyllite-(K) | 3 |
| Heulandite Subgroup | 2 |
| Data |
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| Mineral Data: | Click here to view Pumpellyite Subgroup data |
| Locality Data: | Click here to view Bull Run Quarry, Conklin, Loudoun County, Virginia, USA |
| Photo Gallery | View Gallery (2 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 393715 |
| Long-form Identifier: | 1:3:393715:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Pumpellyite Subgroup |
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| 8.3km (5.1 miles) | ⓘChantilly Quarry, Chantilly, Loudoun County, Virginia, USA |
| 10.3km (6.4 miles) | ⓘVulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William County, Virginia, USA |
| References |
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Bull Run Quarry, Conklin, Loudoun County, Virginia, USA