| Locality type: | Quarry |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Tignai Quarry, Tignai, Bussoleno, Metropolitan City of Turin, Piedmont, Italy |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 530735 |
| Long-form Identifier: | 1:3:530735:7 |
| GUID (UUID V4): | 1cddaef3-71d3-4eb9-aa6c-27b1fa5eb33f |
| Nearest other occurrences of Opal |
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| 16.4km (10.2 miles) | ⓘCivrari Mountain, Condove, Metropolitan City of Turin, Piedmont, Italy |
| 23.9km (14.9 miles) | ⓘFubina, Viù, Metropolitan City of Turin, Piedmont, Italy |
| 26.1km (16.2 miles) | ⓘSant'Abaco, Caselette, Metropolitan City of Turin, Piedmont, Italy |
| 26.2km (16.3 miles) | ⓘCalvo Mt. magnesite quarries (Caselette magnesite quarries), Caselette, Metropolitan City of Turin, Piedmont, Italy |
| 26.7km (16.6 miles) | ⓘ"Bardonecchia road" quartzite vein, Oulx, Metropolitan City of Turin, Piedmont, Italy |
| 26.8km (16.7 miles) | ⓘBorna di Pugnetto (Grotta di Pugnetto), Pugnetto, Mezzenile, Metropolitan City of Turin, Piedmont, Italy |
| 28.7km (17.8 miles) | ⓘSan Valeriano quarry, Piossasco, Metropolitan City of Turin, Piedmont, Italy |
| 33.1km (20.6 miles) | ⓘMonte Cruzore (Monte Cruzeau), Cesana Torinese, Metropolitan City of Turin, Piedmont, Italy |
| 34.6km (21.5 miles) | ⓘPoggio San Vittore asbestos mine, Balangero, Metropolitan City of Turin, Piedmont, Italy |
| 40.5km (25.2 miles) | ⓘSeccarezze Quarries, Luserna San Giovanni, Metropolitan City of Turin, Piedmont, Italy |
| References |
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