A recent novelty. In this specimen, we can observe radial globular aggregates formed by carlhintzeite crystals—ranging from tabular to acicular—very sharp, transparent, and showing a yellowish to colorless hue. As is customary, we proceeded to analyze several specimens and observed that the transparent crystals displaying these tabular habits are also carlhintzeite, with the shade varying from yellow to colorless within the same crystal.

Some specimens are accompanied by transparent creedite crystals, which exhibit distinct prismatic forms. Both species are halides, but creedite contains sulfur from its sulfate group, allowing us to identify it via electron microscopy as well. We will include the analytical results for the buyer of the specimen.

Reserved

A recent novelty. In this specimen, we can observe radial globular aggregates formed by carlhintzeite crystals—ranging from tabular to acicular—very sharp, transparent, and showing a yellowish to colorless hue. As is customary, we proceeded to analyze several specimens and observed that the transparent crystals displaying these tabular habits are also carlhintzeite, with the shade varying from yellow to colorless within the same crystal.

Some specimens are accompanied by transparent creedite crystals, which exhibit distinct prismatic forms. Both species are halides, but creedite contains sulfur from its sulfate group, allowing us to identify it via electron microscopy as well. We will include the analytical results for the buyer of the specimen.

Reserved

A recent novelty. In this specimen, we can observe radial globular aggregates formed by carlhintzeite crystals—ranging from tabular to acicular—very sharp, transparent, and showing a yellowish to colorless hue. As is customary, we proceeded to analyze several specimens and observed that the transparent crystals displaying these tabular habits are also carlhintzeite, with the shade varying from yellow to colorless within the same crystal. Some specimens are accompanied by transparent creedite crystals, which exhibit distinct prismatic forms. Both species are halides, but creedite contains sulfur from its sulfate group, allowing us to identify it via electron microscopy as well. We will include the analytical results for the buyer of the specimen.

120 €

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Clusters of green pyromorphite crystals on a quartz matrix. Green, bright, hexagonal prisms... A piece to enjoy under magnifying loupe.

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A very rich group of colorless and transparent hexagonal calcite prisms with flat pinacoid terminations. They have excellent luster and are arranged on a goethite matrix. A very aesthetic specimen.

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These plover specimens usually come loose, off the matrix. In this specimen, we can see a doubly terminated crystal on a sericite-talc matrix.

In this specimen, we can see numerous tabular ferberite crystals with a very unusual orientated parallel growth. Very lustrous and intensely black in color, they are arranged on a matrix of clear quartz crystals. This specimen comes from the Nicolau collection (Barcelona) and was acquired from Dr. Joan Viñals.

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Velvety layer of cyanotricite covering the qcalcite matrix with small fluorite cubic crystals. The colour is very attractive. It comes from J. Viñals and the E. Nicolau collection (Barcelona). Very aesthetic specimen.

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Excellent specimen formed by numerous idiomorphic wulfenite crystals, richly faceted, brilliant, between transparent to translucent and with an intense orange color. They are accompanied by curious elongated tabular barite crystals. A really fine speciemen from Joan Viñals and purchased by E. Nicolau.

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Very complex specimen formed by various species such as stannite, kesterite, arsenopyrite, muscovite... A very interesting combo from this Chinese mine.

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Orange veins of huanghoite-(Ce), very fine grained and associated with other rare earth carbonates such as sinchysite-(Ce) and Röntgenite-(Ce), along with aegirine of greenish tones. A hard to find rarity. Bayan Obo is the world's largest rare earth deposit (REE). Interestingly the fluorite content of the ores also makes it the largest fluorite deposit in the world. You have to think that the Bayan Obo deposit is 18 km long and 3 km wide, covering a total area of 48 km². The deposit is made up of three main open pit deposits.

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Very rich group of mimetite crystals, with an intense orange color, luster and transparency, with interpenetrated hexagonal crystals truncated by the pinacoidal faces.

A lustrous slightly translucent brown scheelite crystal, this with pale green cubic fluorite crystals at its base. Neat comination piece. From a distinctive and limited find in the late 1990's. With Joan Viñals label. Active under SW-UV light.

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Very interesting specimen formed by a matrix of native copper crystals, partially covered by numerous red to almost black cuprite crystals, very defined and brilliant. It is accompanied in the matrix by delafossite (CuFeO2) aggregates, such as needles and radiated globules. Representative for the species. With the handwritten label of J. Viñals.

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Excellent and aesthetic specimen formed by a large group of fluorite crystals, very well defined, with a cubic shape and beveled edges by the dodecahedron forms. Translucent, with purple zoning colour. They are disposed on a white calcite matrix, on which they contrast. A piece for the best display.

Very esthetic specimen of calcite formed by various flattened interpenetrated rhombohedral crystals, almost lenticular, with very well defined and striated faces. Between translucent to transparent, shiny and on a rocky matrix. It exhibits intense pink to red fluorescence under UV-LW light. Good size and quality.

Twinned cinnabar, with well defined faces and edges, red color slightly silvery, well formed and almost 2 cm in size. It is disposed in a very aesthetic way on dolomite crystals. At the time, this locality produced world-class specimens such as the one we offer. Simply spectacular.

Cuprodongchuanite is a mineral species with the formula Pb₄CuZn₂(PO₄)₄(OH)₂ that has been approved very recently (IMA No. 2021-065); is the copper analogue of dongchuanite (IMA No. 2021-058) with the formula  Pb₄ZnZn₂(PO₄)₄(OH)₂. Both species form a series and belong to the dongchuanite group, together with the zheshengite Pb₄ZnZn₂(AsO₄)₂(PO₄)₂(OH)₂ and the cuprozheshengite Pb₄CuZn₂(AsO₄)₂(PO₄)₂(OH)₂. Distinguishing one species from another is only possible by elemental analysis. For this reason these specimens have been analyzed by SEM-EDS.

In this specimen we have determined the cuprodongchuanite. The presence of As is detected in all the specimens studied, which would indicate that we are in a term of the series with cuprozheshengite. It would be correct to label it cuprodongchuanite-cuprozheshengite. It appears as light green globular aggregates on the colorless hemimorphite. The bluish color on the specimen is veszelyite.

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Cuprodongchuanite is a mineral species with the formula Pb4CuZn2(PO4)4(OH)2 that has been approved very recently (IMA No. 2021-065); is the copper analogue of dongchuanite (IMA No. 2021-058) with the formula Pb4ZnZn2(PO4)4(OH)2. Both species form a series and belong to the dongchuanite group, together with the zheshengite Pb4ZnZn2(AsO4)2(PO4)2(OH)2 and the cuprozheshengite Pb4CuZn2(AsO4)2(PO4)2(OH)2. Distinguishing one species from another is only possible by elemental analysis. For this reason these specimens have been analyzed by SEM-EDS.

In this rich specimen we have determined cuprodongchuanite aggregates. The presence of As is detected in all the specimens studied, which would indicate that we are in a term of the series with cuprozheshengite. It would be correct to label it cuprodongchuanite-cuprozheshengite. It occurs as light green globular aggregates on very well defined veszelyite crystals and on a matrix with hemimorphite.

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Cuprodongchuanite is a mineral species with the formula Pb₄CuZn₂(PO₄)₄(OH)₂ that has been approved very recently (IMA No. 2021-065); is the copper analogue of dongchuanite (IMA No. 2021-058) with the formula  Pb₄ZnZn₂(PO₄)₄(OH)₂. Both species form a series and belong to the dongchuanite group, together with the zheshengite Pb₄ZnZn₂(AsO₄)₂(PO₄)₂(OH)₂ and the cuprozheshengite Pb₄CuZn₂(AsO₄)₂(PO₄)₂(OH)₂. Distinguishing one species from another is only possible by elemental analysis. For this reason these specimens have been analyzed by SEM-EDS.

In this specimen we have determined the cuprodongchuanite. The presence of As is detected in all the specimens studied, which would indicate that we are in a term of the series with cuprozheshengite. It would be correct to label it cuprodongchuanite-cuprozheshengite. It appears as light green globular aggregates on the colorless hemimorphite. The bluish color of the specimen is due to the fact that the hemimorphite covers veszelyite crystals.

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These fluorite crystals have a cubic appearance with growths in tiles on the surfaces of the faces. In this specimen we observe a more intense violet to purple color on the edges and on the outside of the crystals, while inner core has a soft green color. They are disposed on a matrix with quartz crystals. Under shortwave ultraviolet light they fluoresce bluish.

Group of slightly beveled cubic fluorite crystals with polysynthetic growths on the faces and edges. They have a more intense purple color on the edges, very characteristic of these specimens from the Qinglong mine in China. Between translucent to transparent. They are disposed on a matrix with calcite and quartz.

Group of fluorite crystals with a cubic shape, but with the edges and vertices beveled by forms of the trisoctahedron. These beveled edges display a deep purple color that contrasts with the rest of the crystal. They are translucent and stand out on a matrix with small quartz crystals. Under long-wave ultraviolet light they emit a bluish to violet color. A very aesthetic specimen.