Goethite - Mineral specimens search results

Mineral specimens search results

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Mineral specimens search results for [ Goethite ]

Crystals with well defined faces and edges that show "sperkise" twinning, with polycrystalline growths on some of the faces, and that have been totally pseudomorphed by brown Goethite. This piece was found in the 1970s at a now extinct locality. The sample is from the Carles Curto collection whose label and catalog card we will send to the buyer.
San Vicente Mine, Lucena del Cid, Comarca Alcalatén, Castellón / Castelló, Valencian Community / Comunitat Valenciana Spain (±1970)
Specimen size: 4.9 × 3.8 × 2.4 cm = 1.93” × 1.50” × 0.94”

TFA9AN4: Goethite after Pyrite

Goethite pseudomorph after a complete pyritohedral floater crystal of Pyrite. We will send this specimen, from a little known locality among mineral collectors, in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Stonyfell Quarry, Stonyfell, South Mount Lofty Ranges, South Australia Australia
Specimen size: 2 × 1.7 × 1.9 cm = 0.79” × 0.67” × 0.75”

TXM14AN4: Goethite after Pyrite

Floater group of very sharp pyritohedral pseudomorphs of what used to be Pyrite crystals, now replaced by Goethite. The specimen is from the Alain Martaud collection.
Agos-Vidalos, Argelès-Gazost, Hautes-Pyrénées Département, Occitanie France (2017)
Specimen size: 7.4 × 6.4 × 5.4 cm = 2.91” × 2.52” × 2.13”

SV3390EXL: Goethite coating Quartz

A great piece from the San Valentín Quarry. The Quartz crystals are of good size, the Goethite that covers them has intense iridescence and the whole thing has a strange beauty. There is a slight saw cut on the back that barely impacts the visual appearance of the specimen. This piece was in one of the great collections of that area, that of Mariano Guillén. His collection passed to that of Miguel David Martínez with the number 1700 and whose label we will send to the buyer of the specimen.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 9.2 × 6 × 5.2 cm = 3.62” × 2.36” × 2.05”

Main crystal size: 1.1 × 1 cm = 0.43” × 0.39”

SV3140TPZ: Goethite coating Siderite

A brilliant piece. The Siderite specimens from this forgotten locality were once a subject of debate because their appearance resembled Goethite. However, this is actually due to the presence of Goethite, which forms a thin layer covering the outer part of the Siderite “stalactites”! As is often the case, mineral collection and preservation prove to be valuable to the field of mineralogy.
Mina Peyreblanque, Alban, Albi, Tarn, Occitanie France
Specimen size: 7.4 × 4.6 × 3.8 cm = 2.91” × 1.81” × 1.50”

SM390LAB: Goethite on Calcite

Centered growth of acicular Goethite crystals, with good terminations, on a limonite matrix with white Calcite crystals. Among the best known for this locality. This specimen is from the Alain Martaud collection.
Les Redoutières Mine, Chaillac, Le Blanc, Indre, Centre-Val de Loire France (±2002)
Specimen size: 10.4 × 9 × 6.5 cm = 4.09” × 3.54” × 2.56”

Main crystal size: 3 × 0.2 cm = 1.18” × 0.08”

NR87AM5: Goethite on Quartz

Aggregate of very fine acicular Goethite crystals, black, lustrous, in a vug of white Quartz crystals. This specimen, found in the 1970s or 80s, comes from the Pedro Hernández collection.
Tizirine, Ouarzazate Province, Drâa-Tafilalet Region Morocco
Specimen size: 14.2 × 10.3 × 4.4 cm = 5.59” × 4.06” × 1.73”

MM47AM3: Goethite perimorphic Cerussite after Anglesite

Groups on matrix of what were originally Anglesite crystals, now pseudomorphed by Cerussite. Perimorphic Goethite has faithfully preserved the original forms of the Anglesite-Cerussite and exhibits very shiny botryoidal surfaces dominated by metallic green colors.
The specimen comes from the Ignacio Gaspar collection (number CER-57), whose label we will send to the buyer.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 11.5 × 4 × 9.5 cm = 4.53” × 1.57” × 3.74”

FE14Z8: Goethite with Azurite and Malachite

Botryoidal Goethite aggregates with a metallic iridescence and aggregates of small lenticular Azurite crystals and velvety aggregates of acicular Malachite crystals. We especially note the locality, now extinct, and the association of Malachite and Azurite with the Goethite.
Santa Flora Mine, El Madroño, Comarca Sierra Norte, Seville, Andalusia Spain (06/2005)
Specimen size: 5.2 × 3.2 × 3.3 cm = 2.05” × 1.26” × 1.30”

TTB59XXX: Goethite with Calcite

Botryoidal group, with intense luster and a smooth surface, accompanied by small white Calcite crystals that provide contrast with the Goethite. It comes from a locality little known in collecting, which adds interest to the specimen, and it also preserves the pedigree of having belonged to the Harry Critchley collection, Critchley himself being the one who found the specimen. Kremikovtsi is an important mining and metallurgical complex located northeast of Sofia, mainly known for its iron mineralization and mineral associations developed in skarn and metasomatic environments. Kremikovtsi Mine has produced specimens of Magnetite, Hematite, Goethite, Calcite, Quartz, sulfides, and various secondary minerals, some showing aesthetic crystallization and interesting mineral associations for collectors. Geologically, the deposit is related to metasomatic processes developed through the interaction of hydrothermal fluids with host carbonate rocks, forming iron-rich skarn mineralization accompanied by calcium silicates, oxides, and sulfides. Fluid circulation and later alteration also favored the development of cavities with well-defined crystal growth and complex mineral associations.
Kremikovtsi Mine, Kremikovtsi, Stolichna Municipality (Sofia), Sofia-City Province (Sofia-grad) Bulgaria (10/2003)
Specimen size: 8.1 × 5.5 × 3.6 cm = 3.19” × 2.17” × 1.42”

TM61Y7: Goethite with Calcite and Pyrite

Very well defined botryoidal, almost spheroidal, growths of grayish black Goethite with transparent Calcite crystals, with small cubic Pyrite crystals, and on matrix. The Goethite has been analyzed and we’ll send a copy of the analysis to the buyer. We regret we can not provide more precise details about the locality but, as frequently happens with Chinese material, the origin remains unknown.
China (the whole Country) China (2007)
Specimen size: 9.6 × 9.2 × 3.5 cm = 3.78” × 3.62” × 1.38”

TVM42XXX: Goethite with Chabazite-Ca and Quartz

Aggregate in a hemispherical shape of Goethite of good size and excellent development, formed by acicular crystals arranged radially, very lustrous and well defined. The appearance of the specimen suggests that both the frontal and upper terminations are natural and growth-related, and not fracture or cleavage surfaces. On the upper part of the hemisphere there are small Chabazite-Ca crystals, also accompanied by Quartz crystals, forming an unusual association. The strong metallic-silky luster of the Goethite contrasts with the light tones of the matrix and of the associated species. Becker Quarry is located near Freisen, in an area historically known for its volcanic and vein-type rock exploitations associated with the Saar-Nahe massif. Geologically the area belongs to an extensive Permian basin characterized by acidic and intermediate volcanism, with the presence of rhyolites, trachytes and hydrothermally altered rocks. The cavities and fractures developed in these lithologies favored the formation of alteration minerals and secondary species in cavities and fractures.
Becker Quarry, Freisen, Sankt Wendel District, Saarland Germany
Specimen size: 9.6 × 4.2 × 4.7 cm = 3.78” × 1.65” × 1.85”

EM16Z5: Goethite with Conichalcite

Small acicular Goethite crystals, very bright and with reddish reflections due to its pleochroism. They are on a matrix with Quartz crystals, some of them doubly terminated, and with small botryoidal Conichalcite aggregates. Different than most of the usual samples from the Bou Azzer area.
The specimen's photo has been reviewed and published in the magazine ‘Rocks & Minerals’ on page 555 in the volume 90, number 6, Nov/Dec 2015
Aghbar Mine (Arhbar Mine), Bou Azzer mining district, Zagora Province, Drâa-Tafilalet Region Morocco (09/2013)
Specimen size: 9.7 × 5.4 × 6.7 cm = 3.82” × 2.13” × 2.64”

SV2120TMB: Goethite with Hematite and Quartz

Group of fine elongated Goethite crystals, very sharp and lustrous, in a matrix of ferruginous rock partially covered by crystalline aggregates of Hematite in the form of crusts, and disseminated Quartz crystals giving a color contrast with the oxides. The specimen, an English classic from an iron mine in Cornwall which closed in 1883, comes from the old collection of Robert-Auguste Touchon.
Restormel Royal Iron Mine (Trinity Mine), Lostwithiel, St Austell District, Cornwall England / United Kingdom
Specimen size: 6.2 × 5.1 × 3 cm = 2.44” × 2.01” × 1.18”

Main crystal size: 0.2 × 0.1 cm = 0.08” × 0.04”

SM14NDA: Goethite with Quartz

Centered group of acicular Goethite crystals, very lustrous, implanted in a vug of transparent and lustrous Quartz crystals. A Moroccan classic, more elegant than usual.
Tizirine, Ouarzazate Province, Drâa-Tafilalet Region Morocco
Specimen size: 8.9 × 6.6 × 6.7 cm = 3.50” × 2.60” × 2.64”

NFG72XXX: Goethite with Quartz

Group of Goethite crystals with intense and striking iridescence, showing a wide range of metallic colours including golden, green, violet and bluish reflections. The main interest of the specimen lies in its provenance. It was found by Fermín Clemente at the Poderosa Mine, a classic locality mainly known for its Azurites. We are not aware of previous references to Goethites with this type of iridescent coloration from this mine, which adds further interest to the specimen. Geologically, the Goethite formed as an alteration product of iron-bearing minerals present in the deposit, developing in this case surface coatings responsible for the striking iridescence observed.
Poderosa Mine, El Campillo, Comarca Cuenca Minera, Huelva, Andalusia Spain (11-12/2025)
Specimen size: 9.7 × 6 × 3.6 cm = 3.82” × 2.36” × 1.42”

JFD34AN7: Goethite with Quartz

Beautiful iridescent goethites appear not only in Huelva, but also in Murcia, in the famous San Valentín Quarry. They can be very beautiful, like this one that covers Quartz crystals and in which an elongated botryoidal group seems to form a narrow bridge over the Goethite itself. From Alain Martaud's collection, I liked it when I bought it from him because it was so elegant and original.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia) Spain
Specimen size: 6.9 × 5.8 × 3.4 cm = 2.72” × 2.28” × 1.34”

TXB14AP9: Goethite with Quartz

Centered aggregate of fine acicular Goethite crystals, black and lustrous, on a matrix of white Quartz crystals. This type of specimen, which was relatively abundant in earlier times, is currently very difficult to find with this quality.
Tizirine, Ouarzazate Province, Drâa-Tafilalet Region Morocco
Specimen size: 9.2 × 7.8 × 4.9 cm = 3.62” × 3.07” × 1.93”

TRB72XXX: Goethite with Quartz and Calcite

Group of good-quality Goethite crystals, clearly superior to those usually found at this quarry, partially covering a matrix of Quartz crystals with Calcite. It comes from two British collections, first that of Graham Morse and later that of Harry Critchley, a provenance that adds historical significance to the specimen. Geologically, Whatley Quarry exploits a thick succession of Lower Carboniferous limestones in the Mendip Hills. The mineralization occurs in fractures and cavities within the limestone, formed and reactivated during the Variscan deformation. Goethite is a secondary mineral, whereas the Quartz crystallized in cavities associated with the circulation of low-temperature hydrothermal fluids.
Whatley Quarry, Mendip Hills, Whatley, Somerset, South West England England / United Kingdom (03/1998)
Specimen size: 6.3 × 4.4 × 2.9 cm = 2.48” × 1.73” × 1.14”

JFD249AQ1: Goethite with Quartz and Calcite

In the 1980s-1990s little was known about these well-crystallized goethites from Tizirine-Sidi Rahal, which used to be labeled “Pyrolusite”, because their main seller, Infles Abdullah, had his basar near the Imini manganese mine. Later it was learned that the crystals were pleochroic and when analyzed were confirmed to be goethites. This fine piece comes from that glorious period, associated with a group of Calcite crystals, although Calcite, curiously, is a species that is not abundant in these vugs.
Sidi Rahal, El Kelaâ des Sraghna Province, Marrakech-Safi Region Morocco (±1980)
Specimen size: 12.5 × 10.2 × 5.6 cm = 4.92” × 4.02” × 2.20”

Main crystal size: 1 × 0.9 cm = 0.39” × 0.35”

NB58S8: Iridescent Goethite

The iridescent Goethite from Rio Tinto is different from the Tharsis iridescent Goethite, it is not stalactitic and is much more colorful.
From an old find at the classic Rio Tinto mines, this Goethite surprises us with its rich and varied colors.
Cerro Colorado Mine, Rio Tinto Mines, Minas de Riotinto, Comarca Cuenca Minera, Huelva, Andalusia Spain (±1985)
Specimen size: 6.4 × 4.3 × 3.6 cm = 2.52” × 1.69” × 1.42”

NK6S8: Iridescent Goethite

The iridescent Goethite from Rio Tinto is different from the Tharsis iridescent Goethite, it is not stalactitic and is much more colorful.
From an old find at the classic Rio Tinto mine, this Goethite surprises us with its rich and varied colors.
Cerro Colorado Mine, Rio Tinto Mines, Minas de Riotinto, Comarca Cuenca Minera, Huelva, Andalusia Spain (±1985)
Specimen size: 11.5 × 8.7 × 5.5 cm = 4.53” × 3.43” × 2.17”

NJ58K8: Iridescent Goethite

Stalactitic-botryoidal growth with intense iridescence, very bright, metallic reflections, whose dominant colors vary between red, blue and gold. These growths contrast with a later formed phase with smaller and very bright botryoidal growths. The specimen is from a recent find in Tharsis. This locality hasn't produced significant samples in the last twenty years.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia Spain (05-10/2007)
Specimen size: 4.4 × 3.3 × 2.2 cm = 1.73” × 1.30” × 0.87”

NA61L5: Iridescent Goethite

Stalactitic-botryoidal growth forming curious concretions and elongated growths. With intense metallic pastel color iridescence and a later formed phase, also with intense iridescence.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia Spain (05-10/2007)
Specimen size: 6.6 × 4.8 × 4.2 cm = 2.60” × 1.89” × 1.65”

ND80K4: Iridescent Goethite

A novelty from Munich 2007. Stalactitic-botryoidal growth with intense, very bright, iridescence, of dominant colors between pink and red and bluish. On the back it has laminar concretions, also iridescent, formed latterly to the botryoidal phase. The specimen is from a recent find on Tharsis (Filón Sur Mine) that hasn't produced significant samples in the last twenty years.
Filón Sur open pit, Minas de Tharsis, Tharsis, Alosno, Comarca El Andévalo, Huelva, Andalusia Spain (05-10/2007)
Specimen size: 11 × 4 × 3.2 cm = 4.33” × 1.57” × 1.26”

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