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Old specimen of blue fluorite from this mining area in the central-eastern United States. Fluorite crystals have partially corroded cubic shapes. It is accompanied by a galena crystal covered with tiny cerussite crystals. With an old Enric Kucera label.
This specimen, from the Mauldin Mountain quarries, shows an attractive coating of bright-green, botryoidal wavellite on fractured dark gray chert. The wavellite is microcrystalline, making the sparkle in the picture. Very characteristic green colour and good size specimen.
Aesthetic group of topaz crystals aesthetically disposed on a rhyolite matrix. Some of them isolated and very rich in faces. They show very well defined faces and edges, with an excellent transparency and a uniform tone. From a classic locality.
Botryoidal aggregates of smithsonite with a very tastefull bluish green colour, translucent and with brilliance. They are disposed on matrix. From a very interesting American locality. It fluoresces intensely under LW-UV light.
Aesthetic specimen of goethite with chalcophanite with cavities covered by numerous aggregates of sheaf crystals of copper-bearing adamite, with a faint green color in the convergence zone and greener at the ends. It is accompanied by more developed crystals of cuprian austinite. A pleasure under magnifying lens. With old labels.
Aesthetic sprays of acicular transparent natrolite crystals on vuggy basalt matrix. Very unusual specimen on the market fro this locality. Analyzed specimen SEM-EDS.
A specimen of the highest quality for this locality and for the species, named in honour to our colleague D. Antonio Barahona. The species was determined in samples from Pastrana, Mazarrón (Murcia), its type locality, more than a decade ago by Dr. Joan Viñals. This specimen shows various vugs covered by small sky-blue barahonaite crystals. The color is excellent and the size of the sample makes it worthy of a fine showcase. We have also analyzed it and will send the results to the buyer.
Fairfieldite is a rare calcium and manganese phosphate of which the best known specimens belong to this North Carolina mine. In this specimen we can observe various aggregates of tabular crystals, transparent, very well defined and with a slightly beige tone. An excellent specimen for the species.
From what we have been able to elucidate, it is an old specimen, which belonged to the collection of Dr. Buford Nichols, a renowned North American pediatrician who is fond of minerals and specialized in phosphates.
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. From Joan Astor (Barcelona) collection.
Rich group of velvety globular aggregates of rosasite formed by very fine needles, with a color between blue to light blue. They are accompanied by partially corroded crystals of transparent calcite and contrast in a very aesthetic way in a cavity of the goethite matrix. This specimen belongs from the former Joan Astor collection whose handwritten label we will send to the buyer.
An epidote specimen from an unusual North American locality. It occurs as parallel aggregates of very elongated prismatic to acicular crystals, with terminal faces, green in color and transparent.
An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. Translucent, with the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality and size... From a former Austrian collection.
Rich group of hemimorphite crystals forming radial aggregates, with a slightly bluish hue. It is accompanied by black, zoned, tenorite globular aggregates. It belongs to the Joan Astor collection (Barcelona), with a handwritten label and typewritten box.
A very aesthetic miniature formed by various octahedral crystals of fluorite, with a violet to purple color, which contrast on the white quartz matrix. Defined, translucent and with brilliance. The Pine Canyon deposit in New Mexico has been known for more than 20 years and are prized for its fluorite crystals.
These specimens are very rare in this classic locality for the rutile. The matrix is formed by interpenetrating tabular kyanite crystals coated with iridescent shades of 'turgite', a term used for the mixture of goethite and hematite. What is remarkable is a group of rutile crystals, very bright and well defined. A piece with history.
The fossil woods of the US state of Washington have been well known since the 19th century. This specimen is a wood opal from this area and clearly shows the growth rings of the tree in question. If it is a fir tree or another member of the pine trees, it is already a subject on which we cannot pronounce ourselves.
As we can read in a brochure from the 80s (visit link): "Petrified wood is found throughout the state and is symbolic of our early forests. It represents a period of geological time when extensive volcanism buried great forests with volcanic ash and basaltic lava".
Group of prismatic crystals of amazonite, a variety of microcline. With defined faces of prisms and pinacoids. It has this characteristic bluish-green color. Pikes Peak is the "mecca" of the amazonites, one of several mountains formed by the erosion of the Pikes Peak batholith, famous for its myarolytic cavities with smoky quartz, amazonite, topaz, among others. It belongs to the collection of Joan Astor, with a handwritten label and another typewritten.
Rich group of linarite crystals, very bright, with well visible facets and a spectacular color. They upholster a cavity in the quartz matrix. From this classic locality for the species.
Very good size crystal of benitoite, a rare barium and titanium silicate, rich in faces, highlighting those of the trigonal dypraramid, together with those of the hexagonal dypyramid and the pinacoidal faces. Intense color and translucent. It has a small dent in one edge, common in these specimens without affecting the aesthetics of the specimen. On matrix.