Höllkogel, Alpl, Freßnitzgraben, Krieglach, Bruck-Mürzzuschlag District, Styria, Austria

Pretulite in quartz; Chris Auer photo and collection, self collected in 2004

© AC

In Coll. M. Slama Canon EOS 600D with Canon MP-E 65mm f/2.8 1-5x, stacked from 15 Images using Zerene Stacker (Pmax)

© Martin Slama

Pseudocubic goyazite crystals in a vug exposed on a polished slab. Light grey is goyazite, dark grey is crandallite, both with appreciable amounts of Ca and Sr, respectively. Bright spots are contamination marks of the electron beam. Backscattered electron (BSE) image, field of view 0.33 mm, sample HK016 (AN279). Collected 11.4.1997 by Franz ...

Backscattered electron (BSE) image of a sectioned pretulite crystal (grey). It contains numerous exsolution blebs of xenotime-(Y) (white). Cracks in pretulite are filled with lazulite, quartz (both nearly black) and goyazite-crandallite (dark grey). Surrounding minerals are lazulite and quartz. Field of view 0.8 mm. Sample HK016, collected ...

Pretulite crystal in quartz. Length of crystal 0.9 mm, collected by Tobias Schachinger 2004, collection Tobias Schachinger, photo Franz Bernhard

yellow pretulite xl in lazulite In Coll. M. Slama Canon EOS 250D with Canon MP-E 65mm f/2.8 1-5x, stacked from 21 Images using Zerene Stacker (Pmax)

© Martin Slama

Field of view: 3 mm Photo and collection Antonio Borrelli

© Antonio Borrelli

Pretulite crystal in lazulite and quartz. Collected by Horst Wölle before 1996, now possibly in the collection of Eduard Lopatka

© Horst Wölle

Very coarse grained mobilizate composed of apatite (white), clinochlore (green), lazulite (blue) and quartz (grey). Polished slab, field of view 7 cm, sample HK009 (AN225). Collected 1.3.1997 by Franz Bernhard, photo and collection Franz Bernhard.

Three pretulite crystals (light orange) at the deformed contact between a remobilized lazulite-quartz vein and phyllitic host rock. For further explanations see other photos. Polished slab, sample AN1195 (HK046). Collected 18.7.2005 by Franz Bernhard, photo and collection Franz Bernhard.

Pale blue lazulite is replaced and veined by dark grey apatite + muscovite. Lazulite and dark apatite are later crosscut by a veinlet which contains lazulite + quartz in the lazulite-rich domain and white apatite + quartz where it crosscuts dark apatite. Polished slab, field of view 15 cm. Sample HK025 (AN217). Collected 9.11.1997 by Franz ...

Pretulite crystal in quartz. Collector and current whereabout unknown.

© Josef Taucher

Pale blue lazulite is crosscut by numerous thin veinlets filled with black apatite and muscovite. The nearly white lazulite lens at the bottom is also rimmed by black apatite. The schist at the bottom of the sample contains up to 5 mm large, grey apatite clasts. Polished slab, field of view 10 cm, sample HK019 (AN211). Collected 17.5.1997 by ...

Light blue lazulite in quartz. Foliation of the quartz-rich host rock is parallel to the vein margin (upper right part). Polished slab, field of view 14 cm, sample HK001j(AN208). Collected 11.4.1997 by Franz Bernhard, photo and collection Franz Bernhard.

Chabochon size 4,0 x 3,0 cm; Chris Auer photo and collection, self collected in 2005

© AC

Coarse-grained lazulite, apatite, quartz. At the top of the sample is an aggregate of dark clinochlore. At the lower left some orange pretulite crystals. Polished slab, field of view 13 cm, sample HK016 (AN221). Collected 11.4.1997 by Franz Bernhard, photo and collection Franz Bernhard.

Pale blue lazulite is crosscut by two shear zones (bottom left to top right), filled with grey apatite + muscovite. The left shear zone contains some lazulite clasts. Cracks filled with black apatite + muscovite are emanating from the shearzones, possible representing "antiriedel" shears? Polished slab, field of view 14 cm, sample HK026 (AN236). ...

Grey to black, partly banded and folded apatite is partly remobilized and replaced by clinochlore and white apatite. Lazulite is only slightly replaced by clinochlore and apatite. Polished slab, field of view 8 cm, sample HK014 (AN230). Collected 11.4.1997 by Franz Bernhard, photo and collection Franz Bernhard.

Two subhedral, blue lazulite crystals (left) and some white apatite (center)in green clinochlore. At the upper right part lazulite with quartz. This highly unusual specimen represents an eo-alpine tectonometamorphic remobilization product of the lazulite-quartz veins. The light blue lazulite at the extreme left, however, could be a pre-alpine ...

FOV ∼ 5 mm Photo and collection Gerhard Kaller

Aggregates (diameter ca. 1 mm) of radiating acicular cacoxenite needles (PXRD-analysed). Photo Fritz Schreiber.

© Fritz Schreiber 2009

Goyazite/Crandallite mix xtls; SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Three pretulite crystals (light orange, P) at the deformed contact between a remobilized lazulite-quartz vein and phyllitic host rock. L = Lazulite, C = Clinochlore, A = Apatite, M + R = Muscovite and Rutile (the rutiles are the tiny brown spots within brownish muscovite) of the phyllitic host rock. Two of the pretulite crystals were microsampled ...

Chris Auer photo and collection, self collected in 2007

© AC

A perfect little xtl with 0,15 mm; Chris Auer photo and collection, self collected in 2006

© AC

dimension area mm. 2 x 2 photo and collection Luigi Chiappino

Chris Auer photo and collection, self collected in 2007

© AC

FOV ∼ 5 mm Photo and collection Gerhard Kaller

Brown crystalline coatings of kintoreite; SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Rare pale pink strengite with pyrite; SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Typical jarosite xtls, BSE picture; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Tiny pseudocubic goyazite xtls, SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Chris Auer photo and collection, self collected in 2004

© AC

Small Pretulite, 0,5mm - swapped May 2005. Horst

Rare plumbogummite; SEM-EDS analysed - see also BSE pic; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Rare gypsum SEM-EDS analysed; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

Chris Auer photo and collection, self collected in 2004

© AC

Fov ca. 1,25 mm peter neschen colloction (9393)

© neschen

A pseudocubic goyazite xtl coated with apatite, BSE picture; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

BSE picture; Chris Auer photo and collection, ex T.Schachinger coll.

© AC

yellow pretulite xl in quartz In Coll. M. Slama Canon EOS 250D with Canon MP-E 65mm f/2.8 1-5x, stacked from 23 Images using Zerene Stacker (Pmax)

© Martin Slama

Solid Lazulite in Quartz matrix with a lightbrown Chlorite group crystal. Photo and collection Frank Loman.

Pale orange-pink crystalline grain of pretulite, embedded in pale blue lazulite, with dark blue-grey grains of an unidentified mineral. Stack of 33 images.

© Andrew Hodgson

Lazulite outcrop at Höllkogel in September 2004. Upper vein is only visible at the extreme right. Field of view ca. 3 m, photo Christian Auer

Lazulite outcrop at Höllkogel in 1996, showing the upper vein. The lazulite pod (with some clinochlore and quartz) in the center of the image provided the material for the description of pretulite and is now mined out. The lower vein was not yet exposed at that time. Field of view ca. 4 m, photo Franz Bernhard.

Left end of the upper lazulite vein in 2004.

© AC

status Oct.2010

© AC

Lazulite outcrop at Höllkogel, Detail of SE-part. Red object, ca. 11 cm tall, at the SE-part of the upper vein. Someone tried to exploit this sturdy part of the vein rather recently. Pic taken 08/08/2023.

© Franz Bernhard

Lazulite outcrop at Höllkogel, heavily, but not totally exploited lower vein. Red object is ca. 11 cm tall. Pic taken 08/08/2023.

© Franz Bernhard

Lazulite outcrop at Höllkogel, SE-part. White spot is the freshly exposed upper vein, lower vein right of rucksack. Pic taken 08/08/2023.

© Franz Bernhard

Lazulite outcrop at Höllkogel, NW-part. Red object, ca. 11 cm tall, at nearly exploited NW-part of upper vein. At the bottom lower vein. Pic taken 08/08/2023.

© Franz Bernhard

Lazulite outcrop at Höllkogel, NW-part. Red object, ca. 11 cm tall, at nearly exploited NW-part of upper vein. Pic taken 08/08/2023.

© Franz Bernhard