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Tomasz Praszkier's Mindat Home Page

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Tomasz Praszkier

Registered member since 22nd May 2006
Member of the Management Group

Tomasz Praszkier has uploaded:
791 Mineral Photos
55 Locality Photos
20 Other Photos

Tomasz has published 1 article on  RSS Link to blog for Tomasz Praszkier
I am professional geologist, member of "Spirifer" Geological Society from 20 years. Privately I am fascinated by minerals, and the biggest pleasure in my life is to travel, visit localities, and live with beautiful minerals!

Below some info about "Spirifer" (not very up to date but I will try update it soon)

Geological Society “Spirifer”

Minerals and geology form the bedrock of our lives. For many years we have sifted through Poland, Europe and, indeed, the whole world, in search of interesting geological phenomena, such as volcanoes and glaciers. The discovery of minerals is of prime importance to us.
Last year was particularly active, with voyages to the Ukraine, Romania, Bulgaria, Germany, France, Italy, Spain, Morocco, India, Russia, Turkey, Mongolia, China, Tajikistan and Madagascar. The resulting science articles, exhibitions and specimens are the provenance of our Geological Society, known as “Spirifer”. Between voyages for Spirifer, we are students passionate about our work. Spirifer is a non-profit organization based solely on volunteerism. Its main purpose is Earth science education. We compose and publish the only periodical in Poland for minerals collectors; it is called “Otoczak” ( We also organize minerals exchanges, exhibitions, shows (, as well as provide organized weekly educational lessons to children (
Our organization receives no government funding and is completely self-supporting. An important source of that support is the selling of specimens from our voyages.

The mines of Baia Mare region are the subject of intensive exploration by Spirifer. Throughout our last expedition we took hundreds of new interesting specimens for the Society collection and also found lots of materials with potential for publications and exhibitions.

Madagascar was the goal during three explore and search expeditions made by our Geological Society. These expeditions were seven months in duration! We collected a huge amount of material, thousands of specimens. Film and photo documentation of regions and exposures were accomplished.
There is presently a traveling exhibition: “Madagascar - a Dying World”, made with more than hundred photos and thousand of specimens, articles, slide shows and lectures. One of the most spectacular discoveries was the finding in 2001 of excessively calcites twins, whose quality was similar to the best world specimens (video film documentation available).
We are planning to continue exploration project “Madagascar” and other voyages.

The main purpose of the trip to Mongolia was to re-trace the route of famous polish-mongolia paleontologist. A three month expedition yielded dinosaurs fossil sites which were documented in their present condition. We also recorded an appearance of fluorites near Bor-Ondor.
The effects of our journey are articles, few exhibitions, slide shows and hundreds of specimens for Spirifer.

The purpose of the trip to Russia was to document the region of existing polimetalic-skarn deposits in the area of Dalniegorsk (region of Wladywostok), which is famous for unique specimens.

Poland, being our home base, is obviously meaningful with specific and familiar interest for the Society. Even though last year gave us a liquidation of the most famous mineral deposits (a mine of sulphur in Machów, barite in Stanislawow) there still exists in the quarries of granites lots of pegmatites near Strzegom and from quarries on Wisniowka are delivered world class specimens of variscite and wavellite where we try to give the best to other countries.
The paleontological and minerals unique collections from Poland has now about ten thousand specimens. We also try to document and describe most important geological positions in Poland and popularize knowledge about them.

Morocco has been for many years a subject of interest to the Society. Many voyages had documented of mineral and paleontology positions in Antiatlas and High Atlas (e.g., paleozolic near Erfoud and Alnif, Imilchil, Mibladen and Touissite). The society has exhibited extensively on this subject.

Two expeditions to region of Dekkan Traps were conducted by the Society. Their purpose was to explore and document hundreds of positions and specimens. The quarry of basalt near Bombay, Nasik, Poonah and Jalgaon are full of cavities with minerals, which made unusual felling for The Society.
The Society plans more voyages to this region.

Sicily, and especcialy Etna Volcano and Stromboli are a symbol of „living” geological process in Europe. Over the course of three explorations documenting the active volcano, it had created a full documentation of Etna Volcano (in the time of great eruption in 2001) and Stromboli. Pictures and films have resulted. These materials are used for projections and to educate the children and youth.

The area of Tajikistan and Pamir were the main purpose of two expeditions in the summer of 2003 and 2004. The members of the Geological Society were in Rangul, which is known as a place of pegmatics and spinels with overlay of polimetalic mines in Kuchilal, the north side of the country. The expedition saw very interesting diapir of salt Hodza Momin, where they met interesting salt karstic forms.

China for many years has been the subject of special interest of geologists and mineralogists from all over the world. Spirifer took an exploration expedition in 2004. That expedition had been in the region of unusal kras forms- tsingi in the region of Kunming, mogots from the river of Li, travertic terrace Huanglong, hot spring in the area of sleeping volcanos in the region of Tengzong. The contibution for a special attention are the vegetable relics which have place flora of south-west China. The most interesting mineral positions are Tongbei, which are famous for their beautiful garnet in pegmatites cavities.


Favourite Photos

EWT-XKEWulfenite : Pb(MoO4), Mimetite : Pb5(AsO4)3Cl

Multiple photos available
Rowley Mine, Theba, Painted Rock District, Painted Rock Mts, Maricopa Co., Arizona, USA

Dimensions: 27 mm x 25 mm x 12 mm

27 x 25 x 12 mm., Crystals to 8 mm on edge.
Copyright: © Joseph A. Freilich      Photo ID: 221659     Uploaded by: Joseph Freilich   View Count: 901   Approval status: Public galleries    Type: Photo - 3072 x 2848 pixels (8.7 Mpix)

EWT-XKEWulfenite : Pb(MoO4), Mimetite : Pb5(AsO4)3Cl

Rowley Mine, Theba, Painted Rock District, Painted Rock Mts, Maricopa Co., Arizona, USA

Dimensions: 27 mm x 25 mm x 12 mm

27 x 25 x 12 mm., Crystals to 8 mm on edge.
Copyright: © Joseph A. Freilich      Photo ID: 207980     Uploaded by: Joseph Freilich   View Count: 1463   Approval status: Public galleries    Type: Photo - 2040 x 2693 pixels (5.5 Mpix)

9J8-U4FFluorite : CaF2

Rogerley Mine, Rogerley Quarry, Frosterley, Weardale, North Pennines, Co. Durham, England, UK

Dimensions: 7 cm x 6 cm x 4 cm

Two well-formed penetration twinned fluorite crystals, 2.5 cm on edge each, surrounded by smaller fluorites on limestone matrix. 7x6x4 cm overall size. Collected from the Jewel Box Pocket, June 28, 2008.
Copyright: © 2008 Jesse Fisher      Photo ID: 204949     Uploaded by: Jesse Fisher   View Count: 705   Approval status: Public galleries    Type: Photo - 500 x 599 pixels (0.3 Mpix)

N8Y-L1HRhodochrosite : MnCO3, Fluorite : CaF2, Quartz : SiO2

Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA

Dimensions: 11.1 cm x 9.6 cm x 5.3 cm

11.1 x 9.6 x 5.3 cm. This is a superb rhodochrosite, fluorite, and quartz combination specimen from the Rob’s Pocket find at the Sweet Home Mine. Marty was one of the original investors in the specimen recovery operation here, and had early pick of pieces from many pockets, which he added to his own large collection (sold off in 2005). Ex. Martin Zinn Collection.
Copyright: © Rob Lavinsky      Photo ID: 197424     Uploaded by: Robert Lavinsky   View Count: 760   Approval status: Public galleries    Type: Photo - 800 x 695 pixels (0.6 Mpix)

033-K3KRhodochrosite : MnCO3, Quartz : SiO2, Tetrahedrite : Cu6[Cu4(Fe,Zn)2]Sb4S13

Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA

Dimensions: 5.2 cm x 4.2 cm x 2.3 cm

5.2 x 4.2 x 2.3 cm. A superb miniature with gemmy and transparent crystals on tetrahedrite. The matrix is crystallized tetrahedrite of jet black color and lustre. A few clear quartzes accent the piece. From the Octahedron Pocket. Ex. Helmut Bruckner Collection.
Copyright: © Rob Lavinsky      Photo ID: 181395     Uploaded by: Robert Lavinsky   View Count: 1057   Approval status: Public galleries    Type: Photo - 800 x 665 pixels (0.5 Mpix)

59W-5MGRhodochrosite : MnCO3

Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA

Good Luck Pocket Rhodochrosite on tetrahedrite.
Spann collection
2 inches tall, 1 3/4 inches wide.
Photo, Jeff Scovil
Copyright: © Spann Minerals      Photo ID: 175777     Uploaded by: Gail Spann   View Count: 1053   Approval status: Public galleries    Type: Photo - 2000 x 3008 pixels (6.0 Mpix)

XTJ-N9VTourmaline : A(D3)G6(T6O18)(BO3)3X3Z, Quartz : SiO2

Escondido pegmatite, Conselheiro Pena, Doce valley, Minas Gerais, Brazil

Dimensions: 8.2 cm x 2.9 cm

Tourmaline / Quartz (8,2cm x 2,9cm)
Mario Pauwels collection , Jeff Scovil photo

A very fragile but so well balanced specimen of three green gemmy terminated Tourmaline crystals on a fine matrix of two parralel grown and double terminated Quartz crystals. This specimen was collected in august 1996.
This picture has also been featured in the book "Nature's Garden of Crystals" on page 113.
Copyright: © Mario Pauwels      Photo ID: 173693     Uploaded by: Mario Pauwels   View Count: 10867   Approval status: Public galleries    Type: Photo - 1040 x 1600 pixels (1.7 Mpix)

D6K-KGPMicrocline (Var: Amazonite) : KAlSi3O8, Quartz (Var: Smoky Quartz) : SiO2, Albite (Var: Cleavelandite) : NaAlSi3O8

Tree Root pocket, Two Point claim, Teller Co., Colorado, USA

World Class specimen of Amazonite crystals with Cleavelandite and terminated Smoky Quartz!
This is the best small cab I've ever seen from the Tree Root Pocket in Teller County, Colorado.
This specimen is formally of Irv Brown's competition display and widely considered one of the best
specimens from the Tree Root Pocket. I've never found a specimen that can compare to it in terms
of color, sharpness, and aesthetics. It's also completely undamaged and unrepaired.
Measures 8.5 cm by 6 cm in size.
Ex. Irv Brown, Kevin Ward Collections
Currently in the Van Tichelen Collection
Copyright: ©      Photo ID: 157636     Uploaded by: Kevin Ward   View Count: 1081   Approval status: Public galleries    Type: Photo - 382 x 452 pixels (0.2 Mpix)

K0N-W3QSilver : Ag, Acanthite : Ag2S

Freiberg, Freiberg District, Erzgebirge, Saxony, Germany

A tremendous specimen of Native Wire Silver atop Acanthite crystal covered matrix!
This would have to rank as one of the top three finest Silver specimens I've ever seen or
owned. It's definately the finest (and largest) German Silver I've shown on the website.
This specimen came out of the mines in Freiberg in the mid 1800's and was on display
in the Freiberg museum for many decades before being deaccessed in the mid 1980's.
From there it changed hands to Wayne Thompson before being purchased by Dave
Wilber for the Joseph Freilich Mineral Collection. I can't stress enough just how large
and incredible this specimen is. It's one of the true classics from the Freiberg Mining
District and is a Silver collector's dream specimen. A specimen of the quality and
caliber comes along maybe once every decade and this one will happily remain in
my case until the right collector comes along and takes it for his or her collection.
From Freiberg, Freiberg District, Erzgebirge, Saxony, Germany.
Measures 15.5 cm by 8.6 cm in size with a gorgeous antique patina.
Ex. Joseph A. Freilich Mineral Collection via Dave Wilber.
Kevin Ward Personal Silver Collection
Copyright: ©      Photo ID: 154831     Uploaded by: Kevin Ward   View Count: 1978   Approval status: Public galleries    Type: Photo - 489 x 667 pixels (0.3 Mpix)

PAP-GEPRhodochrosite : MnCO3, Sphalerite : ZnS

Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA

Specimen was in the Sweet Home Mine case in the American Mineral Treasures Exhibit at the Tucson Gem and Mineral Show, 2008
Copyright: © 1      Photo ID: 154614     Uploaded by: Stephen C. Blyskal   View Count: 3129   Approval status: Public galleries    Type: Photo - 1893 x 1533 pixels (2.9 Mpix)
Photos 1 to 10 of 22
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