| Locality type: | Town |
| Classification |
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| Species: | Tridymite |
| Formula: | SiO2 |
| Comments: | as content in opal |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Tridymite data |
| Locality Data: | Click here to view Hoyvik, Streymoy, Streymoy Region, Faroe Islands |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 878288 |
| Long-form Identifier: | 1:3:878288:5 |
| GUID (UUID V4): | ae2de906-dfe4-40b5-8d83-18e0c35f174f |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | geochemical and gemological properties of opals from Faroe Islands Franca Caucia, Luigi Marinoni, Alberto Leone...photos and 3 tables Abstract: The opals from Faroe Islands are commercially not very relevant but are important...yellowish-red color fire opal and common opals from these islands are also very appreciated by collectors and can...analysed opals derive from Hoyvik near Torsshavn, in the island of Streymoy. Parent rocks are represented...type with variable contents of cristobalite and tridymite and, in some cases, chalcedony. In order of abundance |
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