HomeMineralsBlogVirtual galleryAbout RMContactUser
Language
0
You are in > Home > Minerals
RM2444   Alumoåkermanite

Specimen of alumoåkermanite (IMA2008-049) from the pegmatites of the Kola peninsula. Honey coloured. It is probably accompanied by species such as cebollite and juanite those form a whitish vein. A very rare species, very visible in the polished section. Good size. It comes from the southern part of the Kola Peninsula.

Size: 3.5 x 3.1 x 1.9 cm.
Sold
RM2446   Arsenic

Botryoidal arsenic aggregates from this classic locality in former Czechoslovakia. It was collected at level 7 of the uranium mine number 21. At the time, due to its antimony content, it was called "Stibarsen" or "Allemontite". Good size. Arsenic specimens from this mine are rare.

Size: 5.5 x 3.2 x 1.1 cm.
Found in 1983.
Classic locality
Sold
RM2441   Tetrahedrite-(Fe) with digenite, malachite and azurite

Tetrahedrite crystals from this Asturian mine are well known and prized by Spanish collectors. In this sample we have tetrahedral crystals, one of them predominant, in which the tris-tetrahedron shapes seem to point. Good size and partially covered by malachite. X ray diffraction analysis (we will send to the buyer) has shown the presence of digenite associated with the alteration of the tetrahedrite. A classic.

Size: 3.1 x 2.7 x 2.5 cm.
Main crystal: 1 cm.
Analyzed specimen with report
Sold
RM2442   Ammineite with atacmite and halite

Sky blue ammeneite occurring as minute crystals on and in halite with green atacamite. From the type locality. This is a fairly rare copper halide and is the first mineral known to contain ammonia radical cation (·NH3) groups.

Size: 3.4 x 2.7 x 2.6 cm.
Sold
RM2445   Bementite

Bementite is a very rare manganese silicate, identified in the well-known Franklin mine (NJ, USA), where it has its type locality. This specimen comes from a mining area located in the central zone of the Pre-polar Urals, known for the manganese, rhodonite and magnetite mines. In this specimen we can observe aggregates of crystals with golden tones that stand out on the matrix. An opportunity for systematic collectors.

Size: 3.4 x 2.5 x 2.4 cm.
Sold
RM2440   Wadeite and aegirine

Excellent specimen of this rare potassium and zirconium silicate. It shows rich aggregates of hexagonal crystals, transparent to translucent, with an excellent brilliance. Colourless to slightly violet.They are disposed on a matrix of acicular aegirine crystals with a very dark green color, almost black. The Kukisvumchorr Mountains are in the central part of the Khibiny Massif. The area has a very interesting mineralogy, notable for its nepheline syenites.

Size: 4.2 x 3.5 x 2.8 cm.
Main crystal: 3 mm.
Sold
RM2402   Pyromorphite

Pyromorphite specimens from the San Andrés mine in Espiel, Córdoba, have been known since the first half of the 20th century. At the beginning of the 80s of this past century several quality specimens were recovered from the mine. This specimen, due to the date on the label of the J. Astor collection (Barcelona), can be dated to this period. The specimen shows several pyromorphite crystals, of good size, brilliant, translucent, thick and with shapes of the hexagonal barrel shaped prism, with the characteristic color between green to yellowish-green. They fill a vug in the goethite matrix. A Spanish classic.

Size: 6 x 3.6 x 3.6 cm.
Main crystal: 0.7 cm.
Found in ca. 1983.
Col. Joan Astor (Barcelona)
Classic locality
Sold
RM2403   Baryte

Rich specimen formed by several aggregates of thick pseudo-hexagonal baryte crystals, with luster, white to yellowish colour, that stand out on a matrix of goethite. The baryte specimens from this Spanish mine are highly prized by collectors. This specimen belongs from the former J. Astor collection (Barcelona). With old labels.

Size: 8 x 5.5 x 3.8 cm.
Main crystal: 0.8 cm.
Found in ca. 1996.
Col. Joan Astor (Barcelona)
Classic locality
Sold
RM2404   Molybdenite

Molybdenite specimens from Inca del Oro are very difficult to find in the market and more with defined crystals. This sample shows a very well defined, bright and well-disposed hexagonal crystal of molybdenite on the matrix. A unique opportunity to include to your collection a very representative and fine specimen for the species. It belongs from the former J. Astor collection (Barcelona). The locality of Inca del Oro is located between the Chilean provinces of Copiapó and Chañaral.

Size: 7.3 x 4.8 x 3.5 cm.
Main crystal: 1.5 cm.
Found in ca. 1980's.
Col. Joan Astor (Barcelona).
Sold
RM2400   Opal and Wood Opal

Very interesting specimen of opal with opalescence of violet, blue, green colors that fill the fissures of a xylopal. Very aesthetic due to its arrangement in veins, contrasting with the sienna warm colors of fossil wood. This Australian locality is known for opalized pineapples. Specimens from this locality are difficult to find.

Size: 10.6 x 3 x 2.5 cm.
Found in ca. 1983.
Col. Joan Astor (Barcelona).
Sold
RM2481   Opal

A classic banded opal from Australia, with violet, green, blue colors. With a good exposed surface showing opalescence. It comes from the A. Trigo collection.

Size: 4.8 x 4 x 2.1 cm.
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Sold
RM2482   Opal

Very glassy opal specimen, with excellent transparency and yellowish bands. From an unusual area of Russia for this variety of quartz. It was acquired by A. Trigo (Mataró) in 1983, in Expominer Mineral Show (Barcelona).

Size: 4.5 x 3.9 x 1.5 cm.
Found in ca. 1983
Col. Antonio Trigo (Mataró).
Sold
RM2439   Quartz

Druse of quartz crystals, milky to hyaline at the tips, with a certain reddish hue. It comes from a Moroccan locality unknown in collections, located in the Boulemane area, north of Aouli. Formed in volcanic rocks.

Size: 8.2 x 7 x 5 cm.
Main crystal: 0.8 x 0.7 cm.
Found in 03/2020
Sold
RM2480   Opal

An extremely glassy opal specimen, transparent to translucent, with bluish to golden tones. An excellent specimen of opal from this classic American locality. It shows some fluorescence under ultraviolet (LW) light. An old piece from the A. Trigo collection (Mataró).

Size: 4.7 x 4.1 x 1.6 cm.
Found in ca. 1991.
Col. Antonio Trigo (Mataró).
Fluorescent under long wave UV
Sold
RM2472   Fluorite and galena

Group of very sharp cubic crystals of fluorite, very transparent, colorless, brilliant and in staggered growth. It presents certain very curious inclusions. Minos matrix of galena. Very aestetic. From the former Trigo Collection (Mataró).

Size: 3.3 x 3.3 x 3.1 cm.
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Sold
RM2478   Rhodochrosite and quartz

Groups of aggregates of rhodochrosite crystals, of a delicate pink color, brilliant. They are accompanied by colorless aggregates of small quartz crystals. Very aesthetic.

Size: 5.6 x 4.1 x 2.2 cm.
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Sold
RM2468   Calcite

Group of very acute scalenohedral calcite crystals, well defined and with a brown colour due to inclusions. Thanks to some of these crystals that show exfoliation, we can observe that it has been formed in the final stages of their growth. From the A. Trigo collection (Mataró).

Size: 6.6 x 4.5 x 4.2 cm.
Main crystal: 1.8 cm.
Found in ca. 1996.
Col. Antonio Trigo (Mataró).
Sold
RM2471   Meteorite Canyon Diablo: Iron IAB-MG

Good size sample of the meteoric impact that took place aproximately 49,000 years ago in this remote area of Arizona. The impact crater stands out, where more than 30 tons of material have been collected since was discovered in 1891. It is a metallic, iron-nickel meteorite, classified as coarse octahedrite. Contains taenite (Fe, Ni) and mostly iron, kamacite variety (Fe, Ni). Weight: 23 grams.

Size: 3.3 x 27 x 1.2 cm. 23 g.
Found in ca. 1997.
Col. Antonio Trigo (Mataró).
Sold
RM2483   Smithsonite

An interesting piece has gone back into the old work at the classic Choix locality and is pulling out some first-class smithsonites of blue, lavender and pink. From the collection of A. Trigo (Mataró).

Size: 4 x 3.5 x 1.7 cm.
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Sold
RM2479   Childrenite

Elongated single crystal of orange-pink childrenite without matrix. Transparent to translucent, with brilliance and defined terminal faces and altered prism.Very unusual for the species. From the former A. Trigo collection (Mataró).

Size: 2.5 x 1.1 x 0.5 cm.
Found in ca. 1985.
Col. Antonio Trigo (Mataró).
Sold
RM2476   Smithsonite

Globular aggregate of good size of smithsonite crystals. Very brilliant, translucent and with some goethite as a matrix. From this classic Mexican mine. It belongs from the A. Trigo Collection (Mataró).

Size: 3.9 x 3.5 x 2 cm.
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Sold
RM2484   Calcite (glendonite variety) pseudomorph after ikaite

Glendonite is the name given to the pseudomorphic calcite after ikaite. Ikaite, a hexahydrated calcium carbonate, was first observed in nature in the 1960s, at the seabed of the Ikka Fjord in Greenland. There, it precipitates due to the mixture of cold water submarine springs (3°C) rich in carbonates with seawater. Ikaite deposits are not usually found due to its poor stability, however, sometimes the rapid conversion of ikaite to calcite and water results in the generation of pseudomorphic calcite aggregates in the shape of the ikaite crystal (so-called glendonites). These calcite pseudomorphs directly replace ikaite above 4ºC.

Size: 6.1 x 2.2 x 1.7 cm.
Found in ca. 1995.
Col. Antonio Trigo (Mataró).
Sold
RM2475   Fluorite and sphalerite

Good sized fluorite crystal from this classic North American mine. It shows the cube shape with staggered growths on one edge, along with polysynthetic growths on the faces. Translucent to transparent, bright and with a violet tone that shows geometric color zoning, more intense on the edges. With a minor "matrix" of sphalerite.

Size: 5 x 4.1 x 2.6 cm.
Main crystal: 4 cm edge/arista
Found in ca. 1988.
Col. Antonio Trigo (Mataró).
Fluorescent under long wave UV
Sold
RM2469   Calcite with chalcopyrite and quartz

Aesthetic specimen of calcite crystals that form this semi-globular aggregate, with luster. It is accompanied by a small matrix with quartz and chalcopyrite crystals. A classic from the Romanian mine of Boldut; from the A. Trigo collection (Mataró). It shows an intense fluorescence under LW-UV light.

Size: 5.5 x 5 x 2.9 cm.
Found in ca. 2005.
Col. Antonio Trigo (Mataró).
Fluorescent under long wave UV
Sold
RM2477   Smithsonite

Hemispherical aggregate of smithsonite crystals, of good size, luster and with a very curious orange-brown color. On the label of the A. Trigo (Mataró) collection it indicates that he bought this specimen from a Moroccan dealer (1989) as "tornuisite", a term for which we have not found references, unless it was wrongly confused with "tarnowizite". Touissit specimens of globular smithsonite are known but rare.

Size: 5.6 x 4.5 x 3 cm.
Found in ca. 1989.
Col. Antonio Trigo (Mataró).
Sold