Expominer Virtual 2022

The Vault

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Carles Curto Text: Carles Curto (formerly curator of the Geology Museum, Barcelona) & Jordi Fabre
Alfredo Petrov Translation: Alfredo Petrov
Assistance from John S. White (former Smithsonian curator) John S. White

 





The Vault

Pyromorphite
Pyromorphite. Front
Front
Pyromorphite. Side / Photo: Joaquim Callén
Side / Photo: Joaquim Callén
Pyromorphite. Detail / Photo: Joaquim Callén
Detail / Photo: Joaquim Callén
Pyromorphite. Detail / Photo: Joaquim Callén
Detail / Photo: Joaquim Callén

Recorded under neon light
 

MBL98AP3: Group of prismatic Pyromorphite crystals, many of them doubly terminated and with color zoning in the center of the crystals, some of them thicker and with hopper terminations. With small traces of matrix formed by tiny Galena crystals. In LED light, the specimen exhibits the greenish tones so typical of this deposit. From a classic locality for the mineralogy of Spain and the European Union, Minas de El Horcajo evokes splendid times in which green lead shone in the darkness of the Malacate and Argentífero shafts. Specimens from this locality and with this quality are increasingly difficult to obtain.
El Horcajo Mines, El Horcajo, Almodóvar del Campo, Comarca Campo de Calatrava, Ciudad Real, Castilla-La Mancha  Spain (±1910)

Specimen size: 6.7 × 4.8 × 3.2 cm = 2.64” × 1.89” × 1.26”

Main crystal size: 2.1 × 0.6 cm = 0.83” × 0.24”

Minor fluorescence long & short UV



Order
Fluorite with Quartz

Recorded under neon light
 

NZL87AP3: A pair of interpenetrant Fluorite crystals of an exceptional size for the deposit, with a very deep and uniform purple-blue color, being of a darker tone, more intense on the edges (best seen in the backlit photo). The crystals have perfectly sharp cube faces with polycrystalline growths on the crystal faces and also on one of the edges, which may seem broken but, in reality, it is recrystallized with polycrystalline growths. Coming from the well-known Asturian mine of La Viesca, specifically from one of the best vugs ever found there: the Las Monjas vug, discovered in May 2010
La Viesca Mine, Las Monjas pocket, La Collada mining area, Huergo, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain (05/2010)

Specimen size: 17.3 × 14.4 × 8.3 cm = 6.81” × 5.67” × 3.27”

Main crystal size: 11 × 10.6 cm = 4.33” × 4.17”




Fluorite with Quartz. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Fluorite with Quartz. Front with light behind / Photo: Joaquim Callén
Front with light behind / Photo: Joaquim Callén
Order
Fluorite with Quartz
Fluorite with Quartz. Front
Front
Fluorite with Quartz. Front with light behind
Front with light behind

Recorded under neon light
Fluorite with Quartz
 

EPX50AP3: Of exceptional size, a group of interpenetrating cubic Fluorite crystals totally covered by small Quartz crystals that give it a multitude of bright reflective points. The Fluorite crystals are a delicate green that looks good when backlit. Coming from an old French mine that was exploited for Fluorite and which was active between 1938 and 1971.
The specimen comes from the collection of Christophe Marot and was found by Grégoire de Bodinat and Sylvain Desfarge in 2009
Exhibited at Ste. Marie 2015 (La Fluorite Pierre d'Exception) and bears the commemorative label.
L'Avellan Mine, Massif L'Esterel, Fréjus, Var, Provence-Alpes-Côte d'Azur  France (12/2009)

Specimen size: 28.8 × 20.4 × 7.6 cm = 11.34” × 8.03” × 2.99”

Main crystal size: 7.6 × 7.2 cm = 2.99” × 2.83”

Fluorescent long & short UV

Former collection of Christophe Marot

€5200 / US$5365 / ¥753270 / AUD$8022

Reservado
Baryte with Quartz (variety saccharoid)

Recorded under neon light
 

MLB16AP3: Obtained in Munich 2022
An important find mined between August and September 2022 in the Bou Nahas Mine in Morocco yielded a series of barytes, among them this floater specimen, formed by very thick tabular crystals of considerable dimensions, aerial and with perfectly defined faces and edges, of a very uniform light blue color, more yellowish towards the vertices of the crystals. As a curiosity, note that it is accompanied by small very white crystals of saccharoidal Quartz that is somehow reminiscent of a carbonate.
High quality for the locality.
Bou Nahas Mine, Oumjrane mining area, Alnif Commune, Tinghir Province, Drâa-Tafilalet Region  Morocco (08-09/2022)

Specimen size: 12.4 × 10 × 6.4 cm = 4.88” × 3.94” × 2.52”

Main crystal size: 6.4 × 4.6 cm = 2.52” × 1.81”


€2200 / US$2270 / ¥318690 / AUD$3393

Baryte with Quartz (variety saccharoid). Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Baryte with Quartz (variety saccharoid). Rear / Foto: Joaquim Callén
Rear / Foto: Joaquim Callén
Reservado
Malachite
Malachite. Malachite.

Recorded under neon light
Malachite
 

MLR97AP3: Spherical aggregates formed of a multitude of acicular Malachite crystals of excellent, very deep and uniform green color, with their well-known velvety appearance, becoming darker in the center of the spheres, with a lighter colored edging at the ends of the needles. In rock matrix, the light colored Dolomite crystals stand out at the base of the piece creating a nice color contrast. Coming from a world class deposit, the Tsumeb Mine, at which two people, both now deceased, played a key role in the supply of quality specimens: Charles Key and Sidney Pieters, the latter having been the original source of this specimen, which was later in a French collection. We will send both labels to the buyer of the piece.
Tsumeb Mine, Tsumeb, Otjikoto Region  Namibia

Specimen size: 9 × 7.7 × 3.5 cm = 3.54” × 3.03” × 1.38”

Main crystal size: 2 × 1.6 cm = 0.79” × 0.63”


€2900 / US$2992 / ¥420090 / AUD$4473

Reservado
Aegirine with Zircon, Orthoclase and Quartz (variety smoky)

Recorded under neon light
 

MFA46AP3: Black and very lustrous Aegirine crystals, two of them clearly dominant, elongated and in parallel growth with very well defined faces and edges and perfectly terminated. Accompanied by a “waterfall” of crystals of very sharp cream-colored Orthoclase, Quartz (smoky variety) forming divergent groups and, especially interesting, crystals of orange colored Zircon growing on Quartz crystals. Sometimes misidentified as Xenotime, analysis confirms it to be Zircon, we will send a copy of the analysis to the buyer.
A superb piece with a very refined aesthetic.
Mount Malosa, Zomba District  Malawi (01/2021)

Specimen size: 14 × 7.2 × 5.6 cm = 5.51” × 2.83” × 2.20”

Main crystal size: 14 × 2.7 cm = 5.51” × 1.06”

Fluorescent short UV

With analysis copy

€1600 / US$1660 / ¥231390 / AUD$2464

Aegirine with Zircon, Orthoclase and Quartz (variety smoky). Front
Front
Aegirine with Zircon, Orthoclase and Quartz (variety smoky). Side
Side
Aegirine with Zircon, Orthoclase and Quartz (variety smoky).
Reservado
Beryl (variety emerald)
Beryl (variety emerald). Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Beryl (variety emerald).
Beryl (variety emerald). Top / Photo: Joaquim Callén
Top / Photo: Joaquim Callén

Recorded under neon light
 

MLX47AP3: Obtained at Munich 2022
Parallel growths of prismatic crystals of Beryl (emerald variety), doubly terminated, between transparent and translucent, with a very uniform green color, with three of the crystals clearly dominant. A gem quality floater sourced from the world's classic locality for the species, Muzo in Colombia. The color of the emerald is caused by chromophores like trivalent chromium or vanadium.
Muzo mining district, Western Emerald Belt, Boyacá Department  Colombia (2022)

Specimen size: 2.5 × 2 × 1.1 cm = 0.98” × 0.79” × 0.43”

Main crystal size: 1.7 × 0.8 cm = 0.67” × 0.31”




Order
Bismuth with Chalcopyrite

Recorded under neon light
 

TPA62AP3: Enormous crystal of Bismuth with well defined faces and edges, a metallic grey color, on a crystalline Chalcopyrite matrix. On the back it exhibits polysynthetic twinning and dissolution forms. Among the largest crystals known for the species.
From the Piaotang Mine in China where tungsten and tin are extracted from quartz veins.
Piaotang Mine, Dayu, Ganzhou Prefecture, Jiangxi Province  China (2021)

Specimen size: 7.5 × 7.2 × 4.2 cm = 2.95” × 2.83” × 1.65”

Main crystal size: 7.5 × 4.5 cm = 2.95” × 1.77”

With analysis copy



Bismuth with Chalcopyrite. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Bismuth with Chalcopyrite. Side
Side
Order
Imayoshiite with Sphalerite, Tobermorite (Group) and Calcite
Imayoshiite with Sphalerite, Tobermorite (Group) and Calcite. Front / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Imayoshiite with Sphalerite, Tobermorite (Group) and Calcite. Detail / Photo: Joaquim Callén
Detail / Photo: Joaquim Callén

Recorded under neon light
 

MFR6AP3: One of the best, if not the best, Imayoshiite of very large size, coming from the 2021 finds that yielded the best known so far for the species. On a good size group of very lustrous twinned Sphalerite crystals several Calcite crystals with dominant scalenohedral forms have been precipitated and then were in turn covered almost entirely by whitish Tobermorite-Clinotobermorite crystals and, finally, a large quantity of Imayoshiite crystals of a pale cream color. Thanks to three "windows" in the Calcite crystals we can see the whole process of formation. This very "geological" specimen has been analyzed and we will send a copy of the analysis to the buyer.
To learn more about this species and the rest of the paragenesis discovered so far in this mine it is essential to read the article ‘Rare Borate Minerals from the Shijiangshan-Shalonggou Deposits, Hexigten Banner, Inner Mongolia, China', whose authors are César Menor-Salván, Berthold Ottens and Ed Richard, featured in Rocks & Minerals, September/October 2021, volume 96, number 5
Shijiangshan Mine, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region  China (09/2021)

Specimen size: 22.3 × 13.7 × 4.8 cm = 8.78” × 5.39” × 1.89”

Main crystal size: 1.1 × 0.8 cm = 0.43” × 0.31”

With analysis copy



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