Faujasite, Limberg bei Sasbach, Kaiserstuhl, Baden (Germany) | |
---|---|
The Limberg quarries are the type location for Faujasite. It was first mentioned by Blum in 1837, but misidentified as Apophyllite which does not occur at the Limberg. The first description as a new mineral was given by Damour in 1842. Faujasite occurs in small zones at the limburgite of quarry I., forming small octahedrons from mostly less than 0.8 mm and often much smaller. Larger crystals up to about 2 mm have been collected from Quarry II., as reported by Knop in 1892 and from Quarry VI. (Lorent, 1933) . Of the members of the Faujasite-series, all the Faujasite-Na, -Mg and -Ca are present. In a recently (2005) collected sample a single crystal was analyzed by K. Belendorff containing Ca++ as the dominating cation but Mg++ and Na+ are also present. Faujasite is associated with Phillipsite in the same cavity and less frequent with Offretite. Dolomite and Calcite may also be present, also Montmorillonite and sometimes Chabazite, which is a rare species at Limberg. | |
Limberg Faujasite Phillipsite Chabazite Offretite Hyalite Dolomite Calcite Aragonite Montmorillonite Paragenesis Literature |
|
Home | Faujasite-Ca from Quarry II., coated with black oxides. Field of view ~2.5 mm |
|
|
Vug coated with Faujasite. Field of view about 10 mm. | 6x9 cm Specimen of Limburgite from Quarry II with large (1.5 to 2 mm) Faujasite-Ca crystals |
|
|
Hemisphere of Phillipsite and a rare non-coated Faujasite octaeder. Field of view about 2 mm. | Faujsaite octaders with Phillipsite hemispheres and mushromm like offretite- aggregates. Field of view about 2.5 mm. |
|
|
Faujasite-twin (spinell-law) with coating. Field of view about 1.5 mm.. | Very rare twice twinned Faujasite. Field og view about 1.5 mm |
|
|
Hemispheres of Phillipsite and coated Faujasite octaeder. Field of view about 1.5 mm. | Faujasite, partly twinned with transparent coating, white on the edges, with Phillipsite. Field of view about 4 mm. |
The Limberg at Mindat.org | The Limberg as a Geotope with a map | The Limberg for tourists |