A very interesting and striking specimen of scepter quartz, transparent and combining a smoky hue with an amethyst coloured zone. It features phantom-like top faces... A true curiosity from the Urals.

Very interesting specimens where kyanite replaces chiastolite, a variety of andalusite, in a graphitic matrix. The specimen shows characteristics associated with the pre-existing andalusite, such as twinning, indicated by the two different orientations of the kyanite replacing it. It is accompanied by prismatic honeyed chiastolite crystals.They have been analyzed. For lovers of rare pseudomorphoses. Very fluorescent (orange) under UV-LW light.

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Very interesting specimens where kyanite replaces chiastolite, a variety of andalusite, in a graphitic matrix. The specimen shows characteristics associated with the pre-existing andalusite, such as twinning, indicated by the two different orientations of the kyanite replacing it. It is accompanied by prismatic honeyed chiastolite crystals.They have been analyzed. For lovers of rare pseudomorphoses.Very fluorescent (orange) under UV-LW light.

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A particularly aesthetic specimen from this important locality with thick, platy crystals with a metallic luster radiating from a central portion on matrix. This structure gives it its name, from the Greek άστρον ("astron") for "star" and φύλλον ("phyllon") for "leaf," alluding to its star-shaped spray pattern and micaceous appearance. Very good size.

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Novelty in SMAM 2025. These are globular aggregates of acute strontianite crystals, white, with a certain transparency, and standing out against a matrix of celestine crystals, very defined, rich in facets, transparent, and lustrous. They come from a mine called "Siniye Kamni" (Russian: Синие Камни), which in Russian means "blue stones," according to the Russian supplier, one of the few at SMAM. They have been analyzed using scanning electron microscopy (SEM-EDS).

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Novelty in SMAM 2025. These are globular aggregates of acute strontianite crystals, white, with a certain transparency, and standing out against a matrix of celestine crystals, very defined, rich in facets, transparent, and lustrous. They come from a mine called "Siniye Kamni" (Russian: Синие Камни), which in Russian means "blue stones," according to the Russian supplier, one of the few at SMAM. They have been analyzed using scanning electron microscopy (SEM-EDS).

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Novelty in SMAM 2025. These are globular aggregates of acute strontianite crystals, white, with a certain transparency, and standing out against a matrix of celestine crystals, very defined, rich in facets, transparent, and lustrous. They come from a mine called "Siniye Kamni" (Russian: Синие Камни), which in Russian means "blue stones," according to the Russian supplier, one of the few at SMAM. They have been analyzed using scanning electron microscopy (SEM-EDS).

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Group of andradite crystals, which show us very well defined faces of the dodecahedron truncated at the edges by those of the trapezohedron. It has an intense brown color and a more marked shine on the trapezohedron faces. Specimen from this classic Russian town that is rare today.

220 €

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Group of analcime crystals, with exceptional size, defined and faceted, with slightly curved edges. With small matrix of volcanic rock. These pieces are very old and difficult to find today. The piece is accompanied by a Marçal Lloria label, by Lloid.

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Lorenzenite is a rare sodium titanium silicate found in nepheline pegmatites and syenites. In this specimen we can see a good-sized brown crystal, shiny, defined and arranged aerially on the matrix. With aegirine needle inclusions.

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Several ilvaite crystals on a druse of quartz crystals, with an intense black color, doubly terminated and twinned. Observing with the magnifying glass we can see perfect doubly terminated crystals, a pleasure. They are arranged in a very aerial way giving the specimen a notable elegance.

A particularly fine specimen from this important locality with thick, metallic-foil-like, flat-laying crystals to 35 mm embedded in matrix. Ex. Emili Nicolau Collection.

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Shungite is a rock, an intermediate form between the amorphous carbon and the graphite containing carbon (30%), silica (45%), and silicate mica (about 20%). Schungite carbon is a fossilized organic material of sea bottom Precambrian sediments of high level of carbonization containing the fullerene-like regular structures. Shungite got its name after the village of Shunga in Karelia (Russian Federation), located on the shore of Onezhskoe Lake, where is located the only one mineral Zazhoginsky deposit of shungites on the territoty of the Russian Federation.
Shungite has a heterogeneous molecular structure in which carbon occurs as 10 nm globules irregularly distributed within carbon showing no structure. The unusual physicochemical and structural properties of shungite are used in diverse industrial and environmental applications including metallurgy, water purification, thermolysis and organosynthesis of cyclic hydrocarbons. Shungite is an effective sorbent for removal of organic and inorganic substances, pathogenic bacteria and heavy metals from contaminated water (Ore Geology Reviews, 2004; 24, 1-2:135-154).

Radial aggregates of normandite, of intense orange color and with transparency. They are disposed in a matrix with aegirine/augite and analcime. Under LW-UV light the white matrix shows some fluorescence with intense orange spots. From the alkaline pegmatites of the Kola peninsula.

This sample comes from the Freiberg Bergakademie and is accompanied by a label from the end of the 19th century and beginning of the 20th. In this old label we can read that the specimen was identified as monazite. To corroborate this fact together with the other accompanying minerals, we proceeded to carry out analyzes by SEM-EDS. The results indicated that the crystals from honey to dark tones, with a vitreous luster, correspond to monazite-(Ce), which is accompanied by rare earth elements such as neodymium or lanthanum, replacing cerium. We also detected the presence of thorium, which explains why the piece shows some radioactive activity. In the potassium feldspar matrix, with quartz, we can observe small black crystals with a metallic luster that would correspond to members of the columbite-(Fe)-columbite-(Mn) series. We have also detected a thorium phosphate-silicate with REE and aluminum traces, with a composition similar to enalite, an independent member of the xenotime-thorite group, although we have not been able to confirm it. We will send the buyer all the analyzes that give this specimen a remarkable mineralogical value.

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Lorenzenite is a rare sodium titanium silicate found in nepheline pegmatites and syenites. In this specimen we can enjoy two bright, well-defined, brown crystals on matrix. A specimen from the Joan Astor Collection.

Compact mass of purple chromian iowaite with minor inclusions of greenish-brown serpentine. Iowaite is one of the former minerals on the locality and mostly replaced by stichtite, which forms a similar aggregates but is more light, lilac coloured.

Achtaragdite is a unique, rare and poorly understood pseudomorph, from this remote Siberian locality that is the Type Locality for grossular garnet. It is a variety of the grossular-hibschite garnet series and is (technically, according to mindat) a hydrogrossular-chlorite-carbonate pseudomorph after what was formerly considered to be wadalite or some other rare hydrogarnet. The real precursor mineral for these pseudomorphs is now considered to be helvite.

Achtaragdite is a unique, rare and poorly understood pseudomorph, from this remote Siberian locality that is the Type Locality for grossular garnet. It is a variety of the grossular-hibschite garnet series and is (technically, according to mindat) a hydrogrossular-chlorite-carbonate pseudomorph after what was formerly considered to be wadalite or some other rare hydrogarnet. The real precursor mineral for these pseudomorphs is now considered to be helvite.

Dalnegorsk fluorite specimens are very difficult to photograph. This is the case of this piece formed by groups of cubic crystals, transparent, colorless, defined, with the edges of the cube beveled by the dodecahedron and inclusions of very curious shapes. It is accompanied by quartz crystals dotted with green chlorite. A very curious piece ...

Group of prase quartz crystals, with good luster, very well defined and contrasting on a matrix covered by andradite crystals. A very aesthetic piece.

Doubly terminated crystal of prase quartz, with a very good size. It shows an intense green color and polycrystalline growths on the faces of the prism. Very aerial and esthetic specimen on a matrix rich in small andradite crystals and green hedenbergite needles. A very aesthetic piece.

Achtaragdite is a unique, rare and poorly understood pseudomorph, from this remote Siberian locality that is the Type Locality for grossular garnet. It is a variety of the grossular-hibschite garnet series and is (technically, according to mindat) a hydrogrossular-chlorite-carbonate pseudomorph after what was formerly considered to be wadalite or some other rare hydrogarnet. The real precursor mineral for these pseudomorphs is now considered to be helvite.

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This is an exceptional sulphur specimen, both for this Russian mine and for the perfection of the crystals. In a cavity of the matrix several very well defined and doubly terminated crystals of sulphur are disposed, clearly showing the dipyramidal faces of different orders. With brilliance, translucent to transparent. With another group of crystals, one of them predominant, on sample side. On a matrix with scalenohedral calcite crystals. Specimens of this mine and with this fine quality are more than difficult to see. A sample from the Astor collection (Barcelona). You can find more information about this locality at geo.web.ru.

Extraordinary translucent laminar specimen of belomarinaite, an extremely rare sodium and potassium sulphate, of good size and with clearly visible crystalline forms. It refers to both chemistry and structure to aphthitalite. These sulfates are formed in saline deposits and in volcanic fumaroles, as is this case. This specimen comes from the type locality for the species. A unique opportunity for systematic collectors.