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RM3006   Silver, var. kongsbergite

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

These specimens are a classic from Las Herrerías mine, and they appeared many years ago. In this piece we can observe a cavity in the rock partially filled with silver foliaceous aggregates, kongsbergite variety, very brilliant and with a silver color with bronze reflections and bluish iridescence, characteristic for the species. This aesthetic and historical specimen has been analyzed and the result will be sent to the buyer. It belongs from the Rolando Gallina mineral collection (Italy).


Size: 5.1 x 5 x 3.7 cm.

Col. Rolando Gallina (Italia).
Classic locality
 

RM955   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead).
Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite and/or bournonite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble. In this specimen we can see some aggregates, one of them predominant, formed by several lanceolated to needle-like crystals, with luster, beige to ocher tone, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 7.4 x 5.5 x 5.2 cm.
Main crystal: 3 x 3 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
Price: 35 €Reserved

 

RM954   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead). Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble. In this specimen we can see two vugs with rich aggregates formed by lanceolated to fibrous crystals, with luster, beige to pink color, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 7.0 x 5.5 x 5.0 cm.
Main crystal: 3.5 x 3 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
 

RM958   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead). Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble. In this specimen we can see rich aggregates formed by lanceolated crystals, with luster, beige to ocher color, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 6.8 x 5.4 x 4.5 cm.
Main crystal: 3 x 3 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
 

RM950   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead). Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble. In this specimen we can see some aggregates formed by several needle-like crystals, with luster, beige to white color, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 5.8 x 4.0 x 3.8 cm.
Main crystal: 5 x 3.5 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
 

RM949   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead). Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble.
In this specimen we can see some several aggregates in the cavity formed by lanceolated to fibrous crystals, with luster, beige tone, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 5.7 x 4.4 x 3.4 cm.
Main crystal: 4 x 4 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
 

RM948   Fluorcalcioroméite (pseudomorphosis) with baryte

Santa Matilde open pit, Grupo minero Berja, Las Herrerías, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

At the beginning of 2014, reviewing some specimens from the Santa Matilde open pit we found into the vugs some groups of lanceolated, fibrous or equidimensional crystals, with pink, beige to white colours, those aroused our interest. After some analysis we could identify as fluorcalcioroméite species (Ca,Na)2Sb5+2O6F,OH), with a small percentage of oxyplumboroméite (Pb2Sb2O7, due to the presence of lead). Both species belong to the isometric system. But the observed symmetry indicated that they are, highly probable, a pseudomorph after stibnite crystals. This is the first report of this mineral in the Iberian Peninsula. Nowadays this quarry is completelly filled by rubble. In this specimen we can see some aggregates, one of them predominant, formed by several lanceolated to needle-like crystals, with luster, beige to ocher tone, accompanied by aesthetic baryte crystals. We will send a copy of the analysis (SEM-EDS, XRD) to the buyer.


Size: 6.6 x 4.8 x 4.5 cm.
Main crystal: 4.5 x 3.5 mm.
Found in ±2004.

Mineral analizado / Analyzed species.
 
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