| Locality type: | Quarry |
| Classification |
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| Species: | 'Hornblende Root Name Group' (not an IMA approved species) |
| Formula: | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Habit: | prismatic |
| Colour: | black |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified, SEM-EDS |
| Associated Minerals Based on Photo Data: |
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| Sanidine | 1 |
| Apatite | 1 |
| Data |
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| Mineral Data: | Click here to view Hornblende Root Name Group data |
| Locality Data: | Click here to view Trachyte quarry, Ponzano, Bagnoregio, Viterbo Province, Lazio, Italy |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 312252 |
| Long-form Identifier: | 1:3:312252:5 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Hornblende Root Name Group |
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| 23.8km (14.8 miles) | ⓘMt Saliette, Valentano, Viterbo Province, Lazio, Italy |
| 27.5km (17.1 miles) | ⓘSan Martino al Cimino, Viterbo, Viterbo Province, Lazio, Italy |
| 28.5km (17.7 miles) | ⓘCase Collina, Pitigliano, Grosseto Province, Tuscany, Italy |
| 31.9km (19.8 miles) | ⓘTre Croci, Vetralla, Viterbo Province, Lazio, Italy |
| 60.4km (37.5 miles) | ⓘMonte Tozzo, Campagnano di Roma, Metropolitan City of Rome Capital, Lazio, Italy |
| 60.5km (37.6 miles) | ⓘFosso Attici, Magliano Romano, Metropolitan City of Rome Capital, Lazio, Italy |
| 60.6km (37.6 miles) | ⓘMonte Cavalluccio, Campagnano di Roma, Metropolitan City of Rome Capital, Lazio, Italy |
| 60.8km (37.8 miles) | ⓘPianciano, Castel Giuliano, Bracciano, Metropolitan City of Rome Capital, Lazio, Italy |
| 81.8km (50.8 miles) | ⓘCrevolone Torrent gabbro outcrop, La Befa, Murlo, Siena Province, Tuscany, Italy |
| 83.0km (51.5 miles) | ⓘCala Grande, Monte Argentario, Grosseto Province, Tuscany, Italy |
| References |
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Trachyte quarry, Ponzano, Bagnoregio, Viterbo Province, Lazio, Italy