Agatized coral with marked bands. In a very visible coral matrix. Filled inside with botryoidal and banded chalcedony. The sparkly, translucent botryoids and banding have a pleasing variety of honey-brown and creamy colors. Very aesthetic and unusual in the marked. Fluoresces in a light-blue color under a long wave fluorescent light.

Size: 8.3 x 5.4 x 3.0 cm.
Main crystal: 45 x 33 x 27 mm. ágata

Col. J.M. Manchion (Barcelona) - No.510 (Kucera, 1990)
Fluorescent under long wave UV

Curious specimen of turquoise, authentic turquoise, of a slightly greenish blue color, forming globular and elongated nucleus, in a matrix of goethite with other phosphates as possibly strengite. It is slightly polished which allows us to see perfectly the forms that the phosphate takes inside the matrix.

Size: 6.5 x 4.0 x 3.2 cm.

Col. J.M. Manchion (Barcelona)

A really aesthetic green variscite specimen from the occurrence at Clay Canyon. The polished specimen hosts a whitish crandallite. Variscite is known from dozens of localities around the world, but the specimens from Utah are amongst the better pieces from the United States. The species is named for the German district of Variscia, which was the medieval name for modern-day Vögtland.

Size: 9.8 x 5.5 x 4.6 cm. (2 unidades)

Ex. L. Daunis (Barcelona)

This kind of specimens are which make the love for minerals is being reinforced. In this piece, three very interesting magnesium species, two hydroxilcarbonates and one hydroxide coexist. On the one hand we observe some aesthetic and brilliant aggregates of foliaceous crystals of dypingite, forming rosettes, of intense white color, although they are colorless. They are accompanied by sheaves of flattened crystals of hydromagnesite, between translucent to transparent, colorless (they are similar to aragonite). All of them are disposed on a rock matrix covered with a layer with botrioidal forms, from blue to gray, of brucite. A Catalan piece that is hard to find today, with unusual species and quality.

Size: 8.5 x 7.0 x 6.0 cm.
Found in 1970's.

Ex. L. Daunis (Barcelona).
Analyzed specimen with report

Vuggy specimen with many cavities lined with sharp tabular wulfenite crystals. They are transparent to translucent, orange to yellow color, with green duftite throughout and malachite globular aggregates. The wulfenite crystals are coated on a druse of white calcite rhombohedral crystals. The crystals are undamaged. Very different than usual.

Size: 8.0 x 4.5 x 6.2 cm.
Main crystal: 6 x 5 mm

Ex. M. Martínez (Barcelona)

An interesting and showy Tsumeb specimen, puffball of lustrous primary malachite acicular crystals, nicely disposed on matrix covered with very glassy, colorless, calcite rhombohedral crystals.

Size: 7.5 x 5.2 x 4.7 cm.

Ex. M. Martínez (Barcelona)

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)

These are the most fine quality romanèchite specimens ever found in Spain. These botryoidal aggregates show the velvet surface formed by several small romanechite/pyrolusite crystals (see SEM photo). These specimens has not been treated, only fresh water. Romanèchite shows in fresh fracture the classic grey color. You can observe small but brilliant crystals of pyrolusite on the stalactitic surface. Analysis will be send to the buyer.

Size: 6.0 x 6.0 x 2.6 cm.
Found in 2017.

Analyzed specimen with report

These are the most fine quality romanèchite specimens ever found in Spain. These botryoidal aggregates show the velvet surface formed by several small todorokite/romanechite/pyrolusite crystals (see SEM photo). These specimens has not been treated, only fresh water. Romanèchite shows in fresh fracture the classic grey color. You can observe small but brilliant crystals of pyrolusite on the stalactitic surface. Analysis will be send to the buyer. Good size.

Size: 11.0 x 7.8 x 5.5 cm.
Found in 2017.

Analyzed specimen with report

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 specimen of eucroite formed by several groups of crystals of this rare hydrated copper arsenate. Crystals show rhombic idiomorphic forms, with defined and bright faces, between translucent to transparent. Under loupe are really atractive. Intense emerald green color, very characteristic, and in the typical shale matrix. In addition from t0he type locality. A systematic fine piece.

Size: 6.0 x 5.2 x 4.7 cm.
Main crystal: 2 x 1 mm.

Classic locality

This specimen is "showing" an excellent group of eucroite crystals, one of them of more than one centimeter, with a remarkable size for this rare hydrated copper arsenate. Crystals present lenticular to rhombic forms, with defined edges, brilliant faces, transparent to translucent. Intense emerald green color, very characteristic. To add more interest, from the type locality. An exceptional piece.

Size: 4.4 x 2.8 x 2.5 cm.
Main crystal: 11 x 9 mm.

Classic locality

This old specimen, of which supplier didn't had no more info about its original owner, was accompanied by a label where we can read: "Goethite pseud. Magnesite". Consulting the works "Minerales de España" by Salvador Calderón (1910) and the modern version of Miguel Calvo (2009), they mention the presence of pseudomorphic substitutions of goethite (limonite) after siderite in this Aragonese locality: Ojos Negros mines. They preserve the rhombohedral form or, less commonly, as "(...) lenticular pseudocrystals or in the form of short prisms with a hexagonal section and rounded faces that can exceed one centimeter in length (...)" (Calvo, 2009).
Therefore we can deduce that what we are showing is one of these curious pseudomorphs of goethite after siderite or magnesite. A good sized specimen, full of crystallographic history, chemistry and a classic Spanish locality.

Size: 11.5 x 6.0 x 4.8 cm.
Main crystal: 22 x 17 mm.

Classic locality

Amazing specimen of clinoatacmite that shows several groups of pseudohexagonal crystals of really good size. With an intense and deep green color, brilliant and with some transparence, some twinned. They are disposed as isolated groups that stand out on a matrix of hyaline quartz crystals, with blue-green tones due to the chrysocolla and malachite they're are covering. An great an exceptional piece.

 

Size: 8.5 x 5.7 x 4.0 cm.
Main crystal: 10 x 8 mm.

Aesthetic specimen that shows several clinoatacamite crystals, with a pseudorhombohedral shape, with an intense green color, brilliance and transparence, some twinned. They are disposed as isolated individuals those stand on a matrix of  brilliant quartz crystals, with blue tones due to the chrysocolla and green due to the malachite. A remarkable piece from this Peruvian mine (enjoy pictures).

Size: 7.7 x 5.7 x 4.8 cm.
Main crystal: 2 x 1 mm.

Group of sharp andradite-grossular crystals, with an exceptional brilliance and a brown color, near to black. They show clear faces of the dodecahedron and the trapezohedron. Disposed on the matrix, contrasting with the white albite and small octahedral crystals of magnetite. A sample of the former Daunis collection; from a Spanish locality not well represented in collections.

Size: 9.0 x 6.8 x 4.5 cm.
Main crystal: 6 x 5 mm.
Found in ca. 1960's

Ex-col Daunis (Barcelona)
Analyzed specimen with report

Rich specimen formed by several isolated crystals of talmessite, translucent to transparent, defined, from pink to orange. They are disposed on a matrix with bright calcite crystals and green crystalline aggregates of conichalcite. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is talmessite. We will send the buyer all the details.

Size: 6.7 x 6.4 x 4.8 cm.
Main crystal: 8 x 6 mm.
Found in 2017.

Analyzed specimen with report

Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. We also observed some aggregates with a yellowish green tone; the SEM-EDS analysis indicates that it is a rich Cu cobaltaustinite that curiously presents a remarkable content in Zn and Ni, something unusual. They are disposed on a matrix with brilliant crystals of calcite and dolomite. The sample has been analyzed completely, so we will send the buyer all the results.

Size: 10.5 x 8.4 x 6.4 cm.
Main crystal: 6 x 4 mm.
Found in 2017

Analyzed specimen with report

Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. They are disposed on a matrix with brilliant calcite crystals and dolomite. The sample has been analyzed and we will send all results to the buyer. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is wendwilsonite. We will send the buyer all the details.

Size: 7.8 x 6.0 x 4.5 cm.
Main crystal: 5 x 4 mm.
Found in 2017

Analyzed specimen with report

Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. In the back side, we have a druse very rich in crystals. They are disposed on a matrix with brilliant calcite crystals and dolomite. Some talmessite crystals with an orange tone are asociated. The sample has been analyzed and we will send all results to the buyer. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is wendwilsonite. We will send the buyer all the details.

Size: 7.0 x 5.4 x 5.2 cm.
Main crystal: 5 x 4 mm.
Found in 2017

Analyzed specimen with report

Exceptional native copper specimen from this classic Moroccan locality. This piece stands out for the feather formed by elongated crystals. It is accompanied by numerous crystals with deformed and complex cubic habit. A very aerial and aesthetic specimen.

Size: 4.3 x 2.5 x 2.0 cm.
Main crystal: 30 x 6 mm. pluma

These aragonite pineapples are very rare. This specimen shows a large group of pseudohexagonal crystals, with a tone between gray, violet to brownish, translucent. Dedicated to the aragonite collectors. It comes from the Daunis collection and was collected by him personally in this classic locality.

Size: 6.4 x 6.2 x 6.4 cm.
Main crystal: 22 x 14 mm.

Ex-col Daunis (Barcelona)
Fluorescent under long wave UV

This Spanish aragonite specimen shows several twinned and interpenetrated crystals, one of them with a big size. They have a really good brilliance and tones those varies from whitish to violet, translucent. Twinned cyclically on {110} and showing a hexagonal prismatic habit. Dedicated to the aragonite collectors. It comes from the Daunis collection and was collected by him personally in this classic locality.

Size: 5.9 x 5.5 x 4.5 cm.
Main crystal: 5.9 x 3.0 cm.
Found in ca 1960-70's

Ex-col Daunis (Barcelona)
Fluorescent under long wave UV

This Spanish aragonite specimen shows several twinned and interpenetrated crystals, one of them with a big size. They have a really good brilliance and tones those varies from whitish to violet, translucent. Twinned cyclically on {110} and showing a hexagonal prismatic habit. Dedicated to the aragonite collectors. It comes from the Daunis collection and was collected by him personally in this classic locality.

Size: 4.8 x 4.2 x 3.8 cm.
Found in ca 1960-70's

Ex-col Daunis (Barcelona)
Fluorescent under long wave UV

Nakauriite is a rare hydrated magnesium and copper carbonate, but old formula was Cu8(SO4)4(CO3)(OH)6·48H2O. The sulphate content, originally reported, seems to be questionable according to literature; the crystalline structure is unknown. Palenzona and Martinelli (2007) suggest a formula (Mg,Cu)x(CO3)y(OH)z·nH2O (x, y, z unknown). It appears as fibrous and nodular aggregates of bluish color embedded in the matrix of tremolite/talc. This specimen has an unusual size and is very rich. It comes from the abandoned chromite mines in Ufalei chromite deposits.
Palenzona, A. & Martinelli, A. (2007): La nakauriite del Monte Ramazzo, Genova. Rivista Mineralogica Italiana, 31(1), 48-51.

Size: 8.0 x 5.5 x 4.2 cm.