- Home About RM Minerals
- Virtual Photo Museum Blog RM Contact
- Microscopy and instruments How to Buy Disclaimer
Copyright 2010-2025
www.rosellminerals.com
A definitive specimen of Mibladen cerussite. Transparent to translucent crystals, with an exceptional brightness, unusual, with numerous and aesthetic perfect cyclic twins. Closely observed, it becomes a crystallographic pleasure. One of the best cerussite specimens of Mibladen I've seen... With label from former Manchion collection.
A very aesthetic specimen that shows a vug in the sulphide matrix, partially covered by tabular lanceolated crystals of erythrite. They are disposed very aerial in elegant radial aggregates. Intense color and transparence. They are accompanied by small groups of pale pink almost colorless talmessite-wendwilsonitecrystals of and almost black crystals of arseniosiderite. All standing out on the dolomite. A sample of very good quality and that under increase makes us enjoy these arsenates. We will send all the analytical results to the buyer.
Rich specimen formed by several isolated crystals of talmessite, translucent to transparent, defined, from pink to orange. They are disposed on a matrix with bright calcite crystals and green crystalline aggregates of conichalcite. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is talmessite. We will send the buyer all the details.
Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. We also observed some aggregates with a yellowish green tone; the SEM-EDS analysis indicates that it is a rich Cu cobaltaustinite that curiously presents a remarkable content in Zn and Ni, something unusual. They are disposed on a matrix with brilliant crystals of calcite and dolomite. The sample has been analyzed completely, so we will send the buyer all the results.
Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. They are disposed on a matrix with brilliant calcite crystals and dolomite. The sample has been analyzed and we will send all results to the buyer. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is wendwilsonite. We will send the buyer all the details.
Aesthetic specimen of wendwilsonite formed by numerous sized and isolated crystals, transparent, very well defined, some of them doubly terminated. With an intense and uniform pink color. In the back side, we have a druse very rich in crystals. They are disposed on a matrix with brilliant calcite crystals and dolomite. Some talmessite crystals with an orange tone are asociated. The sample has been analyzed and we will send all results to the buyer. The sample has been analyzed by SEM-EDS and Raman. The results indicate a very low Co content and the Raman indicates that it is wendwilsonite. We will send the buyer all the details.
Exceptional native copper specimen from this classic Moroccan locality. This piece stands out for the feather formed by elongated crystals. It is accompanied by numerous crystals with deformed and complex cubic habit. A very aerial and aesthetic specimen.
A vug that is lined with sharp, hexagonal, grayish-white nepheline crystals, accompanied by lustrous, black crystals of schorlomite as dodecahedral crystals. Schorlomite is a rare garnet group member and much of the material labeled "schorlomite" is, strictly speaking, titanian andradite. Excellent, highly representative combination material of the species. Not very often one can see well formed nepheline crystals of this species, especially crystals this size. Very aesthetic specimen from Jebel Bou-Agrao.
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.
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 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.
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.
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.
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.
Two generations of vanadinite crystals. A good-sized brilliant crystals, with echeloned growths and defined faces and edges. With good color yellow and peppered by deep black coronadite globular aggregates and covering the matrix. Another generation shows small crystals (<1 mm) but with a nice luster, transparence, and yellowish tone. Both are on goethite with mottramite crystals.
In this good size specimen we can observe a group of tabular wulfenite crystals showing well defined faces and parallel growths. They are interpenetrated between them and accompanied by small but perfect tabular wulfenite crystals on matrix. The brilliance is excellent and in thin parts they show transparence. They are very aerial disposed on a matrix of baryte crystals, with cerussite and dolomite.
Very aesthetic calcite specimen showing groups of scalenohedral sharp crystals, with transparence that allow to see reddish geometric inclusions. On a matrix with chalcopyrite and marcassite. Ver unusual for the locality.
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.
Group of sharp fluorapatite crystals of good size showing parallel growth, an elongated prism with vertical striations, and multiple terminal faces truncated by the pinacoid. Good brilliance, translucent and a very distinctive greenish yellow color. They present numerous inclusions of flattened prismatic deep black crystals, also vertically striated and opaque. SEM-EDS analyses indicate that they probably belongs to the hornblende group, most likely magnesio-ferri-hornblende. We will send analysis to the buyer. A very aesthetic and aerial shape specimen.
Group of sharp fluorapatite crystals of good size showing an elongated prism with vertical striations, and multiple terminal faces truncated by the pinacoid. Good brilliance, translucent and a very distinctive greenish yellow color. They present numerous inclusions of flattened prismatic deep black crystals, also vertically striated and opaque. SEM-EDS analyses indicate that they probably belongs to the hornblende group, most likely magnesio-ferri-hornblende. We will send analysis to the buyer. A very aesthetic and aerial shape specimen.
Very brilliant specimen formed by numerous polysynthetic growths of octahedral pyrite crystals. The golden color is superior and brilliance, as we said before, is really excellent. With white milky quartz. A fine piece from a not well represented locality.
These mines are located approximately 50 km south of Alnif, near the border with Algeria. This area was already mined in medieval age for the extraction of copper. In the 60s of the last century, French companies expanded shafts and mineral extraction.
Pure brilliance, pure aesthetics. Group of tabular crystals of baryte showing curved shape with a slightly yellowish tone. Transparent to translucent, with zoned inclusions. It is accompanied by twinned and brilliant crystals of marcasite. A true delicacy.
Fine specimen that shows aggregates of tabular crystals of baryte, with a slight yellowish tone, transparent to translucent, brilliant and with defined faces and edges. Accompanied by several marcasite crystals showing various twins, such as "cockscomb", as aggregates or very aesthetic individual crystals. On a quartz matrix.
These mines are located approximately 50 km south of Alnif, near the border with Algeria. This area was already mined in medieval age for the extraction of copper. In the 60s of the last century, French companies expanded shafts and mineral extraction.
Very rich group of cubic-octahedral galena crystals, well defined faces and edges, partially covering the rocky matrix. They accompanied by aggregates of marcasite, some baryte, and brilliant chalcopyrite.
These mines are located approximately 50 km south of Alnif, near the border with Algeria. This area was already mined in medieval age for the extraction of copper. In the 60s of the last century, French companies expanded shafts and mineral extraction.