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.

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.

A very brilliant cobaltoan calcite specimen with an intense pink color. Brilliance is due to several small calcite crystals. From a classic Moroccan locality.

In this specimen we have a very curious combination of erythrite forms. On the one hand, globular aggregates of this arsenate formed by needle like crystals with a velvet luster and a pale pink color. On the other hand, groups of lanceolated crystals with defined faces and edges, good transparence and deep purple color. All of them are disposed on a matrix with sharp cube octahedron skutterudite crystals. A fine specimen for this Moroccan locality.

On a matrix covered by small quartz crystals, very bright, you have different groups of erythite crystals with a good size, showing the flattened prismatic shapes and intense color, typical for the species. A sample of quality and good size.

In this specimen we can enjoy some groups of rhombohedral cobaltoan calcite. With good pink to purple color, translucent and which are disposed randomly on the matrix. The color is excellent.

Druse of divergent prismatic cobaltoan calcite crystals showing flattened rhombohedral terminal faces, with marked geometric pink color zoning. Translucent and very showy. We can observe original calcite as brown transparent crystals, with a thick layer of intense pink color. Very interesting and different.

Druse of cobaltoan calcite crystals, with an excellent brilliance, transparence and showing very sharp terminal rhombohedral faces ad edges. Color is really good, a gemmy specimen.

Druse of divergent prismatic cobaltoan calcite crystals showing rhombohedral terminal faces, which is not usual, perfectly defined and with good brilliance and translucent. The color varies between pink and tile red . Some of these crystals are partially covered on prism by small and brilliant minute calcite. This color zoning can be seen in the fractured area of the sample. From a Moroccan classic locality.

On a heavy Co-As primary minerals matrix are disposed a rich group of acicular prismatic erythrite crystals. They form the usual globular aggregates but, in this specimen, disposition and this pink to orange color give to the specimen a different touch. A classic from this Moroccan cobalt locality.

On a rich Co-As primary minerals matrix are disposed several groups of acicular crystals of erythrite forming colloquially called: hedgehog aggregates. They are partially covering the matrix, as isolated groups or like a velvet. The pink to fuchsia colors are remarkable and confers to the specimen an excellent aesthetics.

The Bou Azzer's Erythrite is usually found as flattened tabular crystals but sometimes we can enjoy these needle like Erythrite specimens showing spherical aggregates formed by thin tabular crystals with an intense pink to purple color and excellent brilliance. A really good specimen from this Moroccan cobalt mine.