Rosell Minerales

A glassy, translucent to transparent, very sharp, colorless adularia interpenetrated crystals from this classic Swiss locality. Green chlorite has nicely dusted and accented this excellent piece, which is complete all-around and is essentially pristine, except for contacting at the base. An old specimen.
Val Giuv is very rich in Alpine-type fissures, in particular, the Giuv syenite. Pockets are unevenly distributed and are concentrated along the southern boundary of the Giuv syenite rock body. Alpine-type fissures also occur in the aplite dikes but differ slightly in their paragenesis (beryllium minerals like milarite only occur in and around aplites).

Size: 6.5 x 6 x 5.5 cm.
Found in 1970's

Ex. L. Daunis (Barcelona)

A very aesthetic specimen that shows a vug in the sulphide matrix, partially covered by tabular lanceolated crystals of erythrite. They are disposed very aerial in elegant radial aggregates. Intense color and transparence. They are accompanied by small groups of pale pink almost colorless talmessite-wendwilsonitecrystals of  and almost black crystals of arseniosiderite. All standing out on the dolomite. A sample of very good quality and that under increase makes us enjoy these arsenates. We will send all the analytical results to the buyer.

Size: 7.5 x 5.8 x 4.5 cm.
Main crystal: 9 x 8 mm aggr.

Analyzed specimen with report

Aesthetic and brilliant botryoidal hematite from a Scotish locality not well represented in collections. On a reddish baryte matrix.

Size: 8.0 x 7.2 x 4.5 cm.

Ex-col Daunis (Barcelona)

Mellite, also called xylocriptite or honeystone, is an organometallic compound. It is an aluminum salt of the melitic acid; that is, an aluminum benzene-hexacarboxylate hydrate with a chemical formula Al2C6(COO)6·16H2O. This is a rare rare secondary mineral in lignite deposits. In this sample we can observe rich facets and transparence. Nice specimen. Fluorescent under SW-UV.

Size: 5.3 x 4.5 x 3.5 cm.
Main crystal: 18 x 10 mm

Fluorescent under short wave UV

Group of cassiterite crystals, very sharp, with defined faces and edges, good brilliance and transparence showing toasted honey lights. They show very clear cyclic twins. They are disposed very aesthetically contrasting on a matrix of quartz crystals with arsenopyrite. From a classic locality.

Size: 4.8 x 4.5 x 3.5 cm.
Main crystal: 15 x 15 mm.
Found in 2016

A really curious specimen that shows a matrix with well developed crystals of pyrite, partially covered by galena, very bright and with extremely rounded forms, remarkable shape! It is also accompanied by complex crystals of sphalerite. A very aesthetic, unusual and interesting sample.

Size: 6.2 x 6.0 x 4.4 cm.

Very brilliant specimen of arsenopyrite with quartz from this classic Asturian locality. It presents a matrix with quartz and pyrite, and in the cavities several good sized quartz crystals accompanied by small but brilliant arsenopyrite crystals. Spanish classic.

Size: 8.0 x 6.4 x 4.8 cm.

Very rich group of wulfenite crystals, prismatic to tabular, intense orange color with color zoning. This specimen comes from the type locality for the species: Bleiberg, and it is accompanied by an old label: A. Bohländer, pharmacist. In the label we can read "gelbblei" or yellow lead, old name for this species. A historical specimen, from the type locality, with good size and quality... There is a very interesting article about this classic mining locality in mindat: "Collecting Minerals at Bad Bleiberg" by Rudolf Hasler.

Size: 8.7 x 5.0 x 4.4 cm.
Main crystal: 9 x 5 mm.

Group of scapolite (meionite) crystals, one of them of good size, that show the prism and dipyramidal faces. With pearlescent luster and a very characteristic ivory color for the specimens of this Canadian locality. They are accompanied by inclusions of diopside. The specimen has been analyzed and the results will be sent to the buyer. Slightly fluorescent under shortwave UV light. A classic specimen difficult to see in the market.

Size: 7.0 x 6.1 x 5.3 cm.
Main crystal: 5.7 x 5.0 cm.

Fluorescent under short wave UV

From a Bulgarian mine rarely represented in collections we offer this interesting specimen of pyrite with very unusual cubic forms. The crystals have a tabular shape with terminal faces of the octahedron. They are very aerially disposed on a matrix with quartz crystals. A crystallographic and locality rarity.

Size: 3.5 x 3.0 x 1.8 cm.

On a matrix of stalactitic goethite, with a deep brown color, numerous prismatic crystals of pyromorphite are disposed, many of them doubly terminated, between translucent to transparent and with a delicate green color. The specimens of this Italian mine are very unusual in the market. Very interesting and aesthetic speciumen.

Size: 5.3 x 5.0 x 4.5 cm.
Main crystal: 5 mm

The baryte specimens of this Italian mine, which finished its work in the 80's, are considered among the best European classics for the species. This specimen presents a rich group of tabular crystals, with sharp edges and faces, excellent transparence and a superb toasted honey color. It emphasizes among them a crystal of more than 5 cm. Nowadays it is very difficult to find these samples with this quality. An European classic.

Size: 8.7 x 4.5 x 4.0 cm.
Main crystal: 5.3 x 2.7 cm.

Rich group of fluorite crystals, cubic, transparent and very brilliant. With a yellow color with greenish tones. They are partially covered by snowy white rhombohedral curved dolomite crystals. From a classic Spanish mine.

Size: 7.0 x 5.5 x 3.5 cm.

Very curious aggregate of calcite crystals, forming a rosette, which are disposed very aesthetically on a matrix of quartz crystals. We can observe numerous acicular aggregates of goethite included in the quartz and even coming out of it and penetrating the calcite. An unusual Moroccan piece as is its locality. From the Gustav Beck collection.

Size: 4.8 x 3.0 x 3.0 cm.

Col. Gustav Beck

Group of barite crystals with parallel growth, between transparent and translucent, with brilliant, honey to yellowish tone and with defined tabular shape. An aesthetic specimen with a minor marcasite matrix.

Size: 4.8 x 4.3 x 3.7 cm.
Main crystal: 3.7 x 2.8 cm.
Found in 2013.

Two generations of vanadinite crystals. A good-sized brilliant crystals, with echeloned growths and defined faces and edges. With good color yellow and peppered by deep black coronadite globular aggregates and covering the matrix. Another generation shows small crystals (<1 mm) but with a nice luster, transparence, and yellowish tone. Both are on goethite with mottramite crystals.

Size: 8.5 x 7.7 x 4.6 cm.
Found in 2012

Specimen formed by several tetrahedrite crystals, interpenetrated, with brilliance, sharp edges and complex faces. The luster is really good. They are associated with sphalerite, very fluorescent under ultraviolet light (orange). A very easthetic specimen.

Size: 8.7 x 4.3 x 2.7 cm.
Main crystal: 27 x 20 mm.

Fluorescent under LW-UV and SW-UV lights

Group of fluorite crystals showing cubic faces with edges beveled by tetrahexahedron. Brilliance, transparence and with a slight bluish tint. A very aesthetic miniature from this classic fluorite Spanish locality.

Size: 5.7 x 5.5 x 3.0 cm.
Main crystal: 12 x 12 mm.

Very aesthetic stalactic-botryoidal formation of goethite, with some iridescence. This specimen does not show those colors seen in the samples of this locality since it has not been manually husked. It is presented in the original shape with which it appears in the deposit, nowadays very difficult to find.

Size: 8.3 x 4.5 x 3.0 cm.
Found in 2011.

From a locality not well represented in collections, we can enjoy this specimen formed by several fibrous aggregates of actinolite (byssolite), brilliant and with a greenish color. Disposed on a matrix with quartz and albite.

Size: 7.4 x 4.0 x 2.5 cm.

Very brilliant group of interpenetrated cube-octahedral skutterudite crystals, with very well defined faces and edges. They are included in a matrix with pinkish dolomite, NOT acidified. Very aesthetic and sized.

Size: 5.5 x 5.0 x 3.5 cm.
Main crystal: 14 x 14 mm.
Found in 2015.

Aesthetic anglesite specimen that shows a rich group of crystals with a razor-sharp chisel terminations, striated faces characteristic of the species, very sharp and with good transparency and colorless. This specimen date to the late 1970s and were found in the well known Moroccan mining area of Touissit.

 

Size: 7.5 x 6.0 x 3.7 cm.
Main crystal: 12 x 10 mm.
Found in ±1975.

Fluorescent under long wave UV

These specimens of Peruvian arsenopyrite stand out for their excellent luster and perfection of its crystals. With the camera I am not able to capture its real beauty. On a sulfide matrix we can enjoy hundreds of arsenopyrite crystals, prismatic, with defined terminal faces, rather than well-defined. They're accompanied by chalcopyrite crystals with dull luster, but gold tone, also well-defined and twinned. Brilliance and quality. A novelty of Sainte-Marie-aux-Mines 2016.
In this sample we see aggregates of intense black color and metallic luster which analysis indicates that it is ferberite (with minor % Mn). Simply outstanding.

Size: 6.5 x 6.3 x 4.0 cm.
Main crystal: 5 x 2 mm.
Found in 2016.

Very brilliant specimen formed by numerous polysynthetic growths of octahedral pyrite crystals. The golden color is superior and brilliance, as we said before, is really excellent. With white milky quartz. A fine piece from a not well represented locality.
These mines are located approximately 50 km south of Alnif, near the border with Algeria. This area was already mined in medieval age for the extraction of copper. In the 60s of the last century, French companies expanded shafts and mineral extraction.

Size: 6.8 x 5.2 x 4.5 cm.
Main crystal: 10 x 9 mm.
Found in 2013.

Pure brilliance, pure aesthetics. Group of tabular crystals of baryte showing curved shape with a slightly yellowish tone. Transparent to translucent, with zoned inclusions. It is accompanied by twinned and brilliant crystals of marcasite. A true delicacy.

Size: 6.0 x 5.2 x 3.0 cm.
Found in 2013.