| Locality type: | Valley |
| 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 Sissone Valley, Chiesa in Valmalenco, Sondrio Province, Lombardy, Italy |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 146018 |
| Long-form Identifier: | 1:3:146018:6 |
| GUID (UUID V4): | 75e40236-f6e6-4404-81df-3412b67153e2 |
| Nearest other occurrences of Opal |
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| 25.7km (15.9 miles) | ⓘUnnamed pegmatite, Chiavenna, Sondrio Province, Lombardy, Italy |
| 32.2km (20.0 miles) | ⓘParsettens Alp, Tinizong (Tinzen), Surses, Albula Region, Grisons, Switzerland |
| 50.5km (31.4 miles) | ⓘCepina, Valdisotto, Sondrio Province, Lombardy, Italy |
| 72.7km (45.2 miles) | ⓘMadonna d'Ongero, Carona, Lugano, Ticino, Switzerland |
| 78.3km (48.6 miles) | ⓘPuricelli Quarry, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy |
| 78.4km (48.7 miles) | ⓘSubalpina Quarry (Mantegazza Quarry; Gebel Quarry; Bianchi Quarry), Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy |
| 78.4km (48.7 miles) | ⓘLaghetto Quarry, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy |
| 78.5km (48.8 miles) | ⓘBonomi Quarry, Cuasso al Piano, Cuasso al Monte, Varese Province, Lombardy, Italy |
| 80.6km (50.1 miles) | ⓘLake Tremorgio, Fiesso, Prato (Leventina), Leventina, Ticino, Switzerland |
| 95.7km (59.4 miles) | ⓘPiano del Lavonchio (Piano dei Lavonchi), Rio Vasca, Craveggia, Verbano-Cusio-Ossola Province, Piedmont, Italy |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (issue) | | Oddities Pink-Orange Euclase from Brazil Inclusions in Demantoid from Madagascar Photochromism Part 2 ...attractive colour not seen previously in euclase, and also occurs in well-formed crystals and hosts interesting...Index and Bibliography Lists Updated | Opal Prospecting and Mining in South Australia | Photoluminescence...Madagascar—Internal Characteristics and Their Use in Deciphering Geographic Origin 64 By J. C. (Hanco)...Aceite Effect in Colombian Emerald | Iolite from the Czech Republic | Sailboat-like Inclusion in Ruby from |
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