Andreas Ertl's Photo Gallery

1HG-T82Dumortierite Al(Al₂O)(Al₂O)₂(SiO₄)₃(BO₃)

Unterkienstock, Rossatz, Rossatz-Arnsdorf, Krems-Land District, Lower Austria, Austria

Light purple dumortierite crystals (~5 mm in length) from Weißenkirchen in der Wachau (quarry at Unterkienstock), Lower Austria, Austria (Fuchs et al., 2005, EJM).

E03-57DDumortierite Al(Al₂O)(Al₂O)₂(SiO₄)₃(BO₃)

Gföhl Quarry, Gföhl, Krems-Land District, Lower Austria, Austria

Largest Crystal Size: 2 cm

Fibrous purplish grey dumortierite crystals ~2 cm in length; from a pegmatite in a quarry south-east of the village Gföhl, Lower Austria, Austria (Fuchs et al., 2005).

NM1-GX5Olenite NaAl₃Al₆(Si₆O₁₈)(BO₃)₃O₃(OH) , Olenite (Var: Lithian excess-boron olenite) Na(Al₃)Al₆(Si₆O₁₈)(BO₃)₃O₃(OH)

Palelni mine, Khetchel village, Molo quarter, Momeik Township, Kyaukme District, Shan State, Myanmar

Dimensions: 9 mm x 20 mm

Photomicrograph of pale pink “mushroom” tourmaline (olenite) from Momeik, Burma. Crystal aggregate: ~9 x 20 mm.
Analysed specimen; published in:
Ertl, A., Hughes, J.M., Prowatke, S., Ludwig, T., Brandstätter, F., Körner, W. & Dyar, M.D. (2007): Tetrahedrally coordinated boron in Li-bearing olenite from “mushroom” tourmaline from Momeik, Myanmar. Can. Mineral. 45, 891-899.

Y8Y-ULXRanciéite (Ca,Mn²⁺)_0.2(Mn⁴⁺,Mn³⁺)O₂·0.6H₂O , Goethite α-Fe³⁺O(OH)

Marble quarry, Olsa, Friesach, Sankt Veit an der Glan District, Carinthia, Austria

Field of View: 6 mm

Photomicrograph of violet ranciéite crystals in a veinlet of colloform goethite (with a radial fibrous structure), over a thin black manganese oxide coating (hollandite and minor braunite), from Friesach, Carinthia, Austria.
This material was described in:
Ertl, A., Pertlik, F., Prem, M., Post, J.E., Kim, S.J., Brandstätter. F., and Schuster, R. (2005): Ranciéite crystals from Friesach, Carinthia, Austria. European Journal of Mineralogy, 17, 163-172.

Width of the photo section: 6.0 mm.