Rosell Minerales

 
Currency
 
You are in > Home > Minerals

Catálogo de minerales

RM1427   Skutterudite with dolomite

Aït Ahmane, Bou Azer, Ouarzazate, Drâa-Tafilalet, Morocco

Very brilliant group of interpenetrated cube-octahedral skutterudite crystals, with very well defined faces and edges. They are included in a matrix with pinkish dolomite, NOT acidified. Very aesthetic and sized.


Size: 5.5 x 5.0 x 3.5 cm.
Main crystal: 14 x 14 mm.
Found in 2015.

Price: 45 €Buy
 

RM1945   Skutterudite and dolomite

Aït Ahmane, Bou Azer, Ouarzazate, Drâa-Tafilalet, Morocco

Very brilliant group of interpenetrated cube-octahedral skutterudite crystals, with very well defined faces and edges. They are included in a matrix with pinkish dolomite, NOT acidified. Very aesthetic and sized.


Size: 6.0 x 5.8 x 3.8 cm.
Main crystal: 10 mm.
Found in 2015.

Price: 40 €Buy
 

RM1596   Gold, var. electrum

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (20-24%weight): electrum. Under the loupe we can enjoy that some of these aggregates are formed by small crystals of octahedral to cubic shape of the precious metal. We can think a secondary genesis for this gold electrum. We have analyzed these specimens observing that the brilliant metallic matrix corresponds to skutterudite and other sulphides-arsenides. We will send all analysis to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold specimen, with good size and aesthetic.


Size: 6.5 x 4.5 x 3.6 cm.
Main crystal: 18 mm.
Found in 2017

Analyzed specimen with report


 

RM1755   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (23-24%w): electrum.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The deposit where the electrum appeared has been totally covered by mine lands, so more samples can not be obtained on the field. A very rich gold-electrum specimen.


Size: 5.0 x 4.2 x 2.8 cm.
Found in 01/2018.

Analyzed specimen with report


 

RM1666   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (23-24%w): electrum.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold-electrum specimen.


Size: 5.5 x 4.0 x 2.5 cm.
Main crystal: 5 mm.
Found in 2017

Analyzed specimen with report


 

RM1590   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (23-24%w): electrum.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold-electrum specimen, with good size and aesthetic.


Size: 7.5 x 6.0 x 4.0 cm.
Main crystal: 10 mm.
Found in 2017

 

RM1591   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). These specimens show a matrix formed by arsenates such as erythrite and associated sulphides and arsenates of cobalt and iron. We can observe on both the presence of arborescent, filiform and laminar gold aggregates. SEM analysis has shown that this is a variety of gold rich in silver (20-24%w): electrum.
Under the loupe we can enjoy that some of these aggregates are formed by small crystals of octahedral to cubic shape of the precious metal. We can think a secondary genesis for this gold electrum. We have analyzed these specimens observing that the brilliant metallic matrix corresponds to skutterudite and other sulphides. We will send all analysis to the buyer. The gold electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very rich gold specimen, with good size and aesthetic.


Size: 11.5 x 7.8 x 6.5 cm.
Main crystal: 12 mm
Found in 2017

 

RM1597   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). Matrix formed by sulphides, arsenites and arsenates of Co like erythrite, with some crystals, accompanied by several wire to laminar gold aggregates. SEM analysis shows that it is a rich silver gold, variety electrum, unusual. Silver content is similar in all specimens we have analyzed and varies between 20-24% weight.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known. A very nice miniature with several wire and laminar electrum.


Size: 4.0 x 3.3 x 2.6 cm.
Found in 2017

Analyzed specimen with report
 

RM1598   Gold, var. electrum and Erythrite

Taghouni mine, Taghouni, Bou Azer, Tazenakht, Ouarzazate, Morocco

A novelty in Sainte-Marie-aux-Mines (2017). Matrix formed by sulphides, arsenites and arsenates of Co like erythrite, with some crystals, accompanied by several wire to laminar gold aggregates. SEM analysis shows that it is a rich silver gold, variety electrum, unusual. Silver content is similar in all specimens we have analyzed and varies between 20-24% weight.
Under loupe, we can enjoy that some of these gold aggregates are formed by small crystals of octahedral to cubic forms. We can theorize a secondary genesis for this gold-electrum. We have analyzed the matrix of these specimens observing that the bright metallic matrix corresponds to a mixture of cobalt arsenides, probably skutterudite, and other sulphides. We will send all analyzes to the buyer. The gold and electrum in Bou Azer was already described, but the quality of these specimens we offer surpasses what was known.


Size: 6.0 x 4.7 x 2.4 cm.
Found in 2017

Analyzed specimen with report
 

RM1209   Conichalcite with calcite

Bou Azer, Tazenakht, Ouarzazate, Souss-Massa-Draâ, Morocco

An unusual specimen from this Moroccan mining area. Globular aggregates of crystaline conichalcite  with its classic green color, partially covering cavities of the matrix. To give a unique touch of quality to this sample, cavities are covered with bright, water-clear calcite crystals, many of them doubly terminated, and including or covering the conichalcite species. An excellent and brilliant specimen.


Size: 8.0 x 6.5 x 6.0 cm.
Main crystal: 5 x 1 mm
Found in 2015.

 
1