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Todas las subastas / Etnográfica / Deep purple amethyst geode
This remarkable Amethyst geode, originating from Brazil, stands out for its rich and complex internal cavity, which offers an extraordinary variety of crystalline formations. It is not a simple uniform expanse of tiny purple points; on the contrary, crystals of different sizes, colors, and morphologies coexist inside, a testimony to successive mineralization stages that gave rise to a unique three-dimensional composition, enclosed in the host rock. The cavity is entirely lined with a dense druse of Amethyst, whose hundreds of crystals are oriented toward the inner space, creating a luminous backdrop. The tones range from a delicate pale lilac to a deeper violet-tint. The individual terminations, although closely spaced, are clearly distinguishable and reflect light through their geometric faces, producing a succession of glints that changes with each variation in viewing angle, giving dynamism to the specimen. The undisputed centerpiece of this geode is an imposing Amethyst crystal that rises majestically from the center of the formation. Its massive, slender structure stands above the surrounding druse like a true summit. The lavender color, more concentrated in some areas and almost milky in others, reveals internal veining, growth zones, and subtle natural lines that tell its geological history. The large termination presents wide, bright surfaces on which the traces left by the different growth phases are readable, making it a piece of great collectible and educational interest. Around the main crystal, additional secondary formations can be observed. In the upper part of the cavity, in particular, there is a cluster of lighter crystals, partially covered by a very fine brown-reddish microcrystallization with a sparkling appearance. This color is plausibly linked to the presence of natural iron compounds, which create a strong color contrast with the violet of Amethyst and add another level of mineralogical and visual interest to the overall composition. The variety of crystallizations testifies that the geode’s formation did not occur in a single moment. Its history began inside a cavity in an ancient volcanic rock. Silica-rich fluids repeatedly penetrated the empty space, first depositing layers of chalcedony along the walls and subsequently crystalline quartz. The presence of iron traces and the action of natural irradiation gave quartz the characteristic purple color of Amethyst. Differences in crystal size and appearance indicate variations in the chemical and physical conditions of the mineralizing fluids, with some phases favoring the growth of small, dense tips and others allowing individual crystals to develop exceptionally. Later phases introduced new minerals and thin coatings, gradually completing the internal architecture now visible. Any irregularities, small fractures, cavities, or color variations are part of the natural formation of the mineral. The rim of the geode has been skillfully worked and polished to highlight the sequence of Agate and Chalcedony bands. White and translucent bands accompany the cavity’s profile, while along the outer edge appear suggestive gray-blue tones and intense green. The glossy surface thus creates an elegant chromatic frame that surrounds the crystalline interior, preserved in its natural configuration. The specimen is presented on a specially crafted metal stand, which keeps it elevated and slightly tilted, offering an optimal view and enhancing the great central crystal. An ornamental and mineralogical piece of exceptional presence and collector value.
Estimación:€1,400
Ir a la subastaVer todos los artículos deCatawikioEtnográfica
Estimación:
€1,400
African ancestor figure, Melanesia. Marked with crowned H, Prince
10/05/2026
€294.3
Est.: €267.54
OCT 8 | 3:00 PM
¡Lleva tu subasta a coleccionistas de todo el mundo!
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