Podhorní hill, Ovesné Kladruby, Cheb District, Karlovy Vary Region, Czech Republic

BSE image of skeletal surface of thin Sr-rich coating on prismatic fluorapatite with cavities filled by possible allophane in the coarse-grained ijolite vug. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of hexagonal sections through fluorapatites (Fap) showing Sr-rich replacement outer zones: fluorcaphite (Fcp) to unnamed Ca3Sr2 mineral from the residual melt derived from ijolite- and melilitolite-forming magma. Accompanying minerals: Kfs - K-feldspar, Aen - aenigmatite. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

Coarse-grained ijolite - igneous rock consisting of clinopyroxene (black Ti-augite) and vitreous crystals of nepheline. Size 9×5 cm. Collection of author.

© Jakub Jirásek, 2007

Coarse-grained turjaite - igneous rock consisting of clinopyroxene (black Ti-augite) and white crystals of nepheline and altered red to brown melilite. Small leucite crystals are present as well. Size 10×6 cm. Collection of author.

© Jakub Jirásek, 2007

Reddish brown tetragonal crystals of melilite with hexagonal nephelines. Size 7×5 cm, collection of author.

© Jakub Jirásek, 2009

Olivine with rich emerald green color. Size 2x2 mm. Collected November 2009.

© Ales Tomek

FOV 10mm. Collected November 2009.

© Ales Tomek

Length of crystal 5 mm. Collected November 2009.

© Ales Tomek

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

Nepheline crystals up to 4 mm on matrix.

Perfect whitish of sodalite crystal up to 6mm with black crystals of augite on turjaite rock.

Nice hydroxylapatite crystals up to 4mm with nepheline and white talc aggregates

© BB

Melilite orange-brown crystals up to 4 mm with magnetite, black aggregates augite and white nepheline crystals.

Specimen collected and gifted to me by Bohous Bures, thanks!

© Aleš Tomek

Octahedric crystal rich Ti-magnetite up to 7 mm.

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

Group of nepheline crystals with black aggregate of aegirine.

© BB

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

6.9 x 4.0 x 3.3 cm. Melilite refers to a group of tetragonal calcium sorosilicates consisting of eight species. This is rare material, and this particular piece is a classic specimen from this historic locality at Podhora where olivine nephelinites are found. This specimen hosts brownish-green "melilite" and according to the label is associated ...

© Rob Lavinsky & irocks.com

BSE image of skeletal andrémeyerite crystals (Amy) with nepheline (Nph) in melilite group mineral (Mll) from the residual melt derived from ijolite- and melilitolite-forming magma. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of skeletal andrémeyerite crystals (Amy) in melilite group mineral (Mll) from the residual melt derived from ijolite- and melilitolite-forming magma. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of euhedral "oxynatropyrochlore" from the residual melt derived from ijolite- and melilitolite-forming magma. Darker oval is product of EPMA spot measurement. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of Ti-rich magnetite with trellis of exsolution lamellae. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of aggregate of calcite bundles in the coarse-grained ijolite vug. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of prismatic apatite crystal surrounded by aggregate of dolomite flat rhombohedrons in the coarse-grained ijolite vug. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of diopside (Di) transition to hedenbergite (Hd) and aegirine (Aeg) rims at contact with magnetite (Mag) and vug from the residual melt derived from ijolite- and melilitolite-forming magma. Clinopyroxenes show nice transition to more alkaline conditions during crystallization. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of euhedral wilkinsonite crystal (Wkn) in aegirine (Aeg) from the residual melt derived from ijolite- and melilitolite-forming magma. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of prismatic aenigmatite crystal (Aen) overgrown by minute aegirine (Aeg) in devitrified glass matrix (gl) from the residual melt derived from ijolite- and melilitolite-forming magma. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

BSE image of botryoidal coatings of possible allophane on prismatic apatite and other minerals in vug of ijolite. For details see https://doi.org/10.1180/mgm.2026.10210

© Dalibor Matýsek

The quarry is well overgrown, finding described minerals is pretty tough. Photo taken in November 2009.

© Ales Tomek 2011

The entry to the site is hidden inside a deep forrest. November 2009.

© Ales Tomek 2011

Photographed - November 2009.

© Ales Tomek 2011