| Locality type: | Quarry |
| Classification |
|---|
|
| Species: | Tvedalite |
| Formula: | (Ca,Mn)4Be3Si6O17(OH)4 · 3H2O |
| Comments: | In vugs. The tvedalite is always overgrown by a crust of chiavennite |
| Habit: | Spherulites up to 3 mm in diameter; also as radially oriented, platy aggregates completely lining small analcime cavities |
| Colour: | Chreme-white to pale beige; white |
| Abundance at site: | Rare |
| Confirmation |
|---|
|
| Validity: | Valid - Type Locality |
| Associated Minerals Based on Photo Data: |
|---|
|
| Chiavennite | 9 |
| Natrolite | 2 |
| Analcime | 2 |
| Data |
|---|
|
| Mineral Data: | Click here to view Tvedalite data |
| Locality Data: | Click here to view Vevja Quarry, Tvedalen, Larvik Commune, Vestfold, Norway |
| Photo Gallery | View Gallery (7 photos) |
| Data Identifiers |
|---|
|
| Mindat Occurrence Record ID: | 71024 |
| Long-form Identifier: | 1:3:71024:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Tvedalite |
|---|
|
|
| 0.8km (0.5 miles) | ⓘA/S Granit Quarry, Tuften, Tvedalen, Larvik Commune, Vestfold, Norway |
| 1.8km (1.1 miles) | ⓘAlmenningen Quarry (Treschow-Fritzøe Quarry), Tvedalen, Larvik Commune, Vestfold, Norway |
| 1.9km (1.2 miles) | ⓘSagåsen Quarry, Sagåsen, Auenlandet, Porsgrunn, Telemark, Norway |
| 2.3km (1.4 miles) | ⓘSaga Pearl Quarry, Tvedalen, Larvik Commune, Vestfold, Norway |
| References |
|---|
|
Larsen, Alf Olav, Åsheim, Arne, Raade, Gunnar, Taftø, Johan (1992) Tvedalite, (Ca,Mn)4Be3Si6O17(OH)4·3H2O, a new mineral from syenite pegmatite in the Oslo Region, Norway. American Mineralogist, 77 (3-4) 438-443 |
|
Vevja Quarry, Tvedalen, Larvik Commune, Vestfold, Norway