- Home About RM Minerals
- Virtual Photo Museum Blog RM Contact
- Microscopy and instruments How to Buy Disclaimer
Copyright 2010-2025
www.rosellminerals.com
These specimens are formed by numerous prismatic crystals of orthoclase, very well defined and interpenetrated. They are accompanied by acicular crystals of actinolite and epidote, and octahedral magnetite. A piece of good size and quality. They were sold as orthoclase but a recent XRD analysis I have done indicates that it is albite (2/15/2024). Maybe more interesting.
These prehnite specimens are a novelty from the Mineralexpo Barcelona-Sants 2022 mineral show. They show rich groups formed by sheaf aggregates of crystals, very brilliant, translucent and with a very uniform green color. Sometimes they are accompanied by small acicular crystals of actinolite. They belong from a Moroccan locality near Boulemane.
These prehnite specimens are a novelty from the Mineralexpo Barcelona-Sants 2022 mineral show. They show rich groups formed by sheaf aggregates of crystals, very brilliant, translucent and with a very uniform green color. Sometimes they are accompanied by small acicular crystals of actinolite. They belong from a Moroccan locality near Boulemane.
These prehnite specimens are a novelty from the Mineralexpo Barcelona-Sants 2022 mineral show. They show rich groups formed by sheaf aggregates of crystals, very brilliant, translucent and with a very uniform green color. Sometimes they are accompanied by small acicular crystals of actinolite. They belong from a Moroccan locality near Boulemane.
A very good size specimen of skutterudite, with well defined and very brilliant crystals. With quartz crystals. A nice showcase specimen.
A very good sized specimen of skutterudite, with well defined and very brilliant crystals. They are accompanied by aesthetic aggregates of lanceolated saffflorite crystals and quartz. A display fine specimen.
Aesthetic specimen of good size upholstered by a layer of botryoidal aggregates of chrysocolla, with a pale blue to light blue. On the chrysocolla there are numerous aggregates of acicular malachite crystals, transparent, brilliant, velvety and that stand out on the matrix.
Group of fine, laminar, pseudohexagonal calcite crystals with color zoning and small recrystallizations of the same mineral. They are accompanied by small quartz and pyrite crystals. It belongs from the Manchion collection (Barcelona).
Very curious specimen formed by a matrix of baryte, on one side with lenticular crystals sprinkled with vanadinite and on the other with cavities in which aggregates of vanadinite crystals have grown, with color zoning. An old piece with handwritten label.
An excellent specimen of quartz, with a slight smoky tone, which presents very aesthetic "window" geometric growths. Doubly terminated and with complex crystallography. With inclusions. Not very seen in the market.
An excellent specimen of quartz, with a slight smoky tone, which presents very aesthetic "window" geometric growths. Doubly terminated and with complex crystallography. With inclusions. Not very seen in the market.
Group of quartz crystals in parallel growth and with a "scepter" structure. Very well defined faces and edges, brilliant and transparent to translucent. Very aerially disposed on the matrix. An good size and excellent specimen from a Moroccan locality not very known.
Exceptional and old specimen of cerussite from this classic Moroccan locality. It presents several divergent prismatic to tabular crystals of good size, twinned in a "V" shape. Translucent and with a smoky hue. Pure aesthetics, a very difficult specimen to get nowadays.
Very brilliant specimen formed by various cerussite crystals, with a cyclic twin, well defined and translucent. They exhibit intense yellow fluorescence under LW-UV light. They are disposed on an upholstered matrix of small crystals of the same species and, to give an aesthetic touch, a group of orange baryte crystals.
These baryte crystals are very different from the usual ones that we can see coming from this Moroccan locality and even from other deposits famous for baryte. These are prisms of different orders, the predominant third order, truncated by the second order. We observe that a white geometric growth has formed and only affects certain faces of the rhombic prisms. This zoning is unusual for the species. The crystals are transparent and brilliant.
These baryte crystals are very different from the usual ones that we can see coming from this Moroccan locality and even from other deposits famous for baryte. These are prisms of different orders, the predominant third order, truncated by the second order. We observe that a white geometric growth has formed and only affects certain faces of the rhombic prisms. This zoning is unusual for the species. The crystals are transparent and brilliant.
Very aesthetic aggregates of epidote crystals forming beams, with brilliance, defined and with this classic green color. They are disposed on the matrix with quartz crystals, forming very interesting concentric growths.
Very aesthetic aggregates of epidote crystals forming beams, with brilliance, defined and with a classic green color. They are arranged in groups and in an isolated way on the matrix with quartz crystals, on which they stand out.
Very aesthetic aggregates of epidote crystals forming beams, with brilliance, defined and with this classic green color. They are disposed on the matrix with quartz crystals, forming very interesting concentric growths.
These baryte crystals are very different from the usual ones that we can see coming from this Moroccan locality and even from other deposits famous for baryte. These are prisms of different orders, the predominant third order, truncated by the second order. We observe that a white geometric growth has formed and only affects certain faces of the rhombic prisms. This zoning is unusual for the species. The crystals are transparent and brilliant.
These baryte crystals are very different from the usual ones that we can see coming from this Moroccan locality and even from other deposits famous for baryte. These are prisms of different orders, the predominant third order, truncated by the second order. We observe that a white geometric growth has formed and only affects certain faces of the rhombic prisms. This zoning is unusual for the species. The crystals are transparent and brilliant.
Group of cubic to prismatic fluorite crystals, translucent, with a color between violet to purple depending on the incident light. A good size specimen with a matrix on the back. From this classic Moroccan mine.
Divergent aggregates of good sized acicular to prismatic goethite crystals. They are accompanied by black globular aggregates that, once analyzed, have turned out to be a first generation of goethite. It is accompanied by small aggregates of green conichalcite crusts, also analyzed. The specimen shows a fissure that has been consolidated, without affecting its stability and aesthetics.
These specimens show us a chalcopyrite matrix partially transformed into irisdecent covellite-bornite and goethite. In the cavities there are numerous aggregates of prismatic malachite crystals, of an intense green, with transparency and brilliance. If we observe them with the magnifying glass we can see that they are faceted crystals. A novelty in the Bleida mines area.