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RM2241   Elbaite

Cruzeiro mine, São José da Safira, Minas Gerais, Brazil

A very aesthetic miniature, but with an exceptional color variation. Between red, blue, green and yellow. A delicatessen from Brazil, referenced in Joan Astor's published work in issuu, that we recommend you visit and browse.


Size: 0.9 x 0.7 x 0.5 cm.
Found in ca. 1976.

Col. J. Astor (Barcelona). Adq. Lapidis.


 

RM2240   Elbaite

Lavra da Pederneira, São José da Safira, Doce valley, Minas Gerais, Brazil

Prismatic elbaite crystal, of an intense color, with the defined pinacoidal face truncating the prism. The label indicates that it comes from South Africa, but we are not aware that specimens like this have been found in this part of the world. A miniature gemmy piece.


Size: 1.2 x 0.6 x 0.6 cm.
Found in ca. 1973.

Col. J. Astor (Barcelona).


 

RM2239   Topaz

Virgem da Lapa, Minas Gerais, Brazil

A very interesting specimen of topaz, in which we can see striated faces on the prism, truncated by pinacoids, very unusual. Transparence, brilliance and with the handwritten label from the Astor collection indicating "negative" faces. This piece was adquired to the well-know Catalan dealer Jordi Figueras, one of the suppliers of the Folch collection.


Size: 4.5 x 3.4 x 2.5 cm.
Found in ca. 1978.

Col. J. Astor (Barcelona). Adq. J. Figueras.


 

RM2229   Elbaite

Golconda pegmatites, Governador Valadares, Minas Gerais, Brazil

Group of elbaite crystals, in parallel growth, with striated prismatic faces, deep green color and good luster. From the former Manchion collection, with the characteristic label.


Size: 5.4 x 2.6 x 2.4 cm.
Found in 1989.

Col. Manchion (Barcelona) #483.


Price: 70 €Buy
 

RM2223   Quartz with inclusions

Corinto, Minas Gerais, Brazil

Excellent specimen of a quartz crystal with inclusions. In this specimen we can see green and reddish inclusions, most likely due to growths of chlorite and iron oxides in the growing crystal. A very interesting and aesthetic piece. From the Joan Astor collection.


Size: 5.8 x 5.5 x 4.5 cm.
Found in ca. 1975.

Col. Joan Astor.


Price: 45 €Buy
 

RM2222   Quartz with inclusions

Corinto, Minas Gerais, Brazil

Excellent specimen of a quartz crystal with geometric inclusions. In this specimen we can see green and reddish zonations, most likely due to growths of chlorite and iron oxides on the facets of the growing crystal. A very interesting and aesthetic piece. From the Joan Astor collection.


Size: 6.5 x 4 x 3 cm.
Found in ca. 1975.

Col. Joan Astor.


 

RM2216   Rhodochrosite

Uchucchacua mina, Oyón, Lima, Peru

Group of rhodochrosite crystals with a uniform pink color, with well-defined rhombohedron echeloned and scalenohedron forms. Good gemmy transparence. They are accompanied by other smaller rhodo crystals. On a solid matrix with quartz crystals with inclusions and manganese oxides.


Size: 6.5 x 3.5 x 3.4 cm.
Main crystal: 6 mm.

Price: 55 €Buy
 

RM2215   Rhodochrosite

Uchucchacua mina, Oyón, Lima, Peru

Group of rhodochrosite crystals with a uniform pink color, with well-defined rhombohedron echeloned and scalenohedron forms. Good gemmy transparence. They are accompanied by other smaller rhodo crystals. On a solid matrix with quartz crystals with inclusions and manganese oxides.


Size: 4.8 x 3.2 x 3.2 cm.
Main crystal: 5 mm.

Price: 45 €Reserved

 

RM2170   Galena, Chalcopyrite and quartz

Huaron mines, Huayllay, Pasco, Peru

An old specimen of this Peruvian mine that shows a large group of cubic galena crystals, interpenetrated, with its characteristic gray tone. They have stepped growths on the faces and some natural cavities, which give them a differentiated appearance.


Size: 11 x 9 x 6 cm.
Main crystal: 2.0 cm.
Found in 11/1985.

#185 Col. Manchion (Barcelona).


Price: 65 €Buy
 

RM2162   Chalcopyrite with quartz

Huaron mines, Huayllay, Pasco, Peru

Group of chalcopyrite crystals, one of good size, with defined shapes arranged on quartz hyaline crystals. An aesthetic miniature.


Size: 5.2 x 3.5 x 2.5 cm.
Main crystal: 1.6 cm.
Found in ±1987.

#360 Col. Manchion (Barcelona).


 

RM2168   Beryl aquamarine

Coronel Murta, Minas Gerais, Brazil

A good size beryl crystal, aquamarine variety, from those of oldtimes. It shows the faces of the hexagonal prism and terminal flat pinacoid. From the Manchion collection (Barcelona).


Size: 8.8 x 4.4 x 3.4 cm.
Found in 1988.

#279 Col. Manchion (Barcelona).


 

RM2120   Bournonite with pyrite, galena

Huanzala Mine, Huallanca, Dos de Mayo, Huánuco, Peru

Very aesthetic specimen formed by numerous bournonite crystals, excellent luster, sharps and cyclically twinned. They are accompanied by cube octahedral galena crystals with rounded faces and edges and brilliant pyrite. Nice miniature.


Size: 4.5 x 3.6 x 2.4 cm.
Main crystal: 8 mm.
Found in 2019.

 

RM2121   Bournonite with pyrite, sphalerite

Huanzala Mine, Huallanca, Dos de Mayo, Huánuco, Peru

In a matrix formed by octahedral pyrite crystals, very bright and faceted, various groups of sphalerite crystals are disposed on which the bournonite cyclic twins stand out. They are accompanied by small quartz crystals and hydrozincite globules. A very aesthetic piece.


Size: 5.2 x 3.8 x 3.2 cm.
Main crystal: 6 mm.
Found in 2019.

 

RM2036   Rhodochrosite

Uchucchacua mina, Oyón, Lima, Peru

Group of rhodochrosite crystals with a uniform pink color, with well-defined rhombohedron echeloned and scalenohedron forms. Good gemmy transparence. They are accompanied by other smaller rhodo crystals. On a solid matrix with quartz crystals with inclusions and manganese oxides.


Size: 4.8 x 4.6 x 4 cm.
Main crystal: 1 cm.

 

RM2037   Rhodochrosite

Uchucchacua mina, Oyón, Lima, Peru

Group of rhodochrosite crystals with a uniform pink color, with well-defined rhombohedron echeloned and scalenohedron forms. Good gemmy transparence. They are accompanied by other smaller rhodo crystals. On a solid matrix with fluorite, quartz crystals with inclusions and manganese oxides.


Size: 4.8 x 4.6 x 2.6 cm.
Main crystal: 1.1 cm.

Price: 55 €Buy
 

RM2020   Hydroxylherderite with muscovite and albite

Córrego Frio mine, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

A classic old-time specimen of hydroxylherderite, well crystallized, with sharp translucent idiomorphic monoclinic crystals. Lustrous and with a greenish-yellow tone. Associated with albite and muscovite from the Golconda pegmatite in Brazil. From Manchion Collection, purchased to Dr. Joan Viñals. Previously misidentified as herderite.


Size: 5.5 x 4.2 x 2.7 cm.
Found in ±1987.

Col. Manchion #364, J. Viñals 04/1987,
Price: 75 €Buy
 

RM1996   Lepidolite

Golconda pegmatites, Governador Valadares, Minas Gerais, Brazil

Good sized rounded, globular crystals of lilac-pink lepidolite. This formation is also known as ball-peen lepidolite after the resemblance to the round end of a ball-peen hammer. Lepidolite is a Li-rich member of the series between polylithionite and trilithionite. A very aesthetic specimen from Manchion Collection.


Size: 9.4 x 9.2 x 8.2 cm.
Found in ±1991.

Col. Manchion #610.
 

RM2000   Hydroxylerderite with muscovite and albite

Córrego Frio mine, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

A classic old-time specimen of hydroxylherderite, well crystallized, with sharp translucent idiomorphic monoclinic crystals. Lustrous and with a greenish-yellow tone. Associated with albite and muscovite from the Golconda pegmatite in Brazil. From Manchion Col., purchased in 1987 to Dr. Joan Viñals. Previously misidentified as herderite. Previamente mal identificada como herderita.


Size: 6.5 x 4.3 x 4.2 cm.
Main crystal: 3 mm
Found in 1987.

Col. Manchion #354, J. Viñals 04/1987,
 

RM1978   Rhodochrosite with quartz and fluorite

Uchucchacua mina, Oyón, Lima, Peru

Group of rhodochrosite crystals that stand out for their color, with well-defined scalenohedron shapes and good transparence. Accompanied by other smaller rhodo crystals. On a matrix with manganese oxides, hyaline quartz crystals and some colorless fluorite.


Size: 5.0 x 3.3 x 3.2 cm.
Main crystal: 8 mm.

 

RM1977   Rhodochrosite with quartz

Uchucchacua mina, Oyón, Lima, Peru

Group of Rhodochrosite crystals with a uniform pink color, with well-defined scalenohedron shapes and good gemmy transparence. They are accompanied by other smaller rhodo crystals. On a solid matrix with hyaline quartz crystals with inclusions and manganese oxides.


Size: 5.7 x 3.8 x 3.8 cm.
Main crystal: 7 mm.

 

RM1976   Fluorite with rhodochrosite

Uchucchacua mina, Oyón, Lima, Peru

We have labeled this specimen as fluorite, because it highlights a group of crystals of this species, transparent to translucent, with complex facets of the dodecahedron, with faces with polysynthetic growths. They are disposed in a vug of bright rhodo crystals and intense pink. A second generation of rhodo forms globules of honey tone. A very curious and aesthetic Mina Uchucchacuapiece.


Size: 5.6 x 4.3 x 3.6 cm.
Main crystal: 3.5 mm.

 

RM1944   Hematite

Casa de Pedra mine, Congonhas, Minas Gerais, Brazil

Excellent specimen formed by a polysynthetic growth of hematite crystals, with an exceptional brightness. Rich in faces, defined edges and a good size for the species and the locality.
Rob Lavinsky said: "Splendent, complex hematite crystals form a striking specimen from this less well-known Brazilian locale. The majestic, large crystal, with numerous amazing faces is 3.5 cm and is nearly pristine. This fine piece is complete-all-around. Choice and uncommon material from the Larry Krause dealer stock". [go to mindat]


Size: 5.2 x 4.2 x 3.8 cm.
Main crystal: 3.7 x 3.5 cm.

 

RM1962   Sphalerite pseudom. after wurtzite

San José mine, Ciudad de Oruro, Cercado, Oruro, Bolivia

A huge size group of interpenetrated crystals of hexagonal shape, with a dark gray metallic color and brilliant luster. Crystals of this specimen remind wurtzite for its complex hexagonal shape and dipyramids observed. Many similar samples from this mine has been classified as wurtzite. For this reason we heve proceeded to analyze them. The results indicate that this is a really amazing and interesting pseudomorphosis of sphalerite after wurtzite. A great opportunity for psedomorph and Bolivian mineral collectors.
Studies were carried on by X-ray diffraction of the matrix and hexagonal crystals. They have shown that it is sphalerite. Also, the Raman spectra shows that in the innermost areas of the crystals wurtzite presence has been detected, the rest is sphalerite. SEM-EDS yield a composition:  (Zn1.05,Fe0.09)Σ=1.14S1.00.
Specimens of well developed wurtzite are unusual. This hexagonal zinc sulphide, with some iron, presents dimorphism with sphalerite. It is known that wurtzite is stable at high temperatures, low temperatures being the most stable phase sphalerite. This Bolivian mine is the type locality for the wurtzite. We will send the analysis reports to the specimen buyer.


Size: 5.7 x 4.2 x 3 cm.
Main crystal: 15 mm.

Analyzed specimen with report


 

RM1917   Topaz (var. Imperial) in matrix

Topaz mine, Antônio Pereira, Ouro Preto, Minas Gerais, Brazil

Usually these imperial topaz appear without matrix. In this specimen we can enjoy a prismatic crystal, doubly terminated by the pinacoids, with brilliance, transparence and intense color. With small ding in lateral face. It is gemmy from top to bottom.


Size: 5.7 x 4.8 x 4.5 cm.
Main crystal: 16 x 15 mm.

 

RM300   Silver

Estaño Orcko mine, Colavi, Machacamarca, Cornelio Saavedra, Potosí, Bolivia

Specimen of a little-known locality. These sample shows aggregates of silver crystals, with an intense luster and tones between white and golden. They are disposed on a matrix with quartz and iron oxides with which they contrast.


Size: 6.4 x 4.8 x 2 cm.
Main crystal: 8 mm.
Found in 08/2011

 
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