Excellent, pure aesthetics. It is a group of arfvedsonite crystals of intense black color, shiny, with defined and shiny faces, arranged on a matrix of feldspar, orthoclase. From the Nicolau collection (Barcelona), with a handwritten label by Joan Viñals.

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Group of microcline crystals, of good size, defined and brilliant, showing the Manebach twin, characteristic of this species. With J. Viñals handwritten label.

65 €

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Group of aegirine parallel growth with very elongated crystals, bright faces and very sharp and acute termination. Almost black green that makes it stand out for its aerial position on a matrix of smoky quartz crystals. A nice gem.

Very elongated crystal of aegirine, brilliant, defined with clearly visible terminal faces. A very aerial and aesthetic piece.

Group of sharp aegirine crystals in parallel growth, with striated prismatic shapes and sharp terminals. Good brilliance and very dark green, almost black. With a small quartz and feldspar matrix.

Group of smoky quartz crystals where one stands out for its development, brilliance and a very uniform smoky tone. Accompanied by prismatic black aegirine crystals, bright and with defined faces and edges. On a matrix of feldspar (microcline). Very aesthetic piece.

Druse formed by developed orthoclase crystals showing twins and complex combinations those we left for crystallography lovers. Good brilliance, defined edges and faces, uniform color, slightly marbled... A piece of quality, from a well-known locality.

Cluster formed by well developed orthoclase crystals showing twins and complex combinations those we left for crystallography lovers. They present some faces with hopper-like forms. Good brilliance, defined edges and faces, uniform color, slightly marbled... A piece of quality, from a well-known locality.

Interesting specimen of aegirine showing defined prisms with an intense color almost black, brilliance and sharp, prismatic and marked terminal faces. They are accompanied by a some groups of zircon crystals in parallel growth, showing the tetragonal prism and dipyramids. Good orange to yellowish tones, some transparency on edges and disposed in aerial way on aegirine matrix.