Exquisite Polished Agate Geode Section A magnificent...

Spectacular Brazilian geode section with sparkling crystals — This specimen features a refined geode section, where the chromatic depth of the agate bands meets the delicate luminosity of a sparkling crystal cavity. The sample has been meticulously cut and polished on the outer surface, enhancing its intricate bands and colors, while the wide central cavity has been left intact to showcase the natural growth of the crystals. The heart of the geode is lined with a dense spread of quartz crystals, characterized by amethyst tones ranging from pink-lavender to very light purple, with slightly more intense hues in the deeper areas of the cavity. The numerous crystal terminations capture light with their geometric faces, generating a sequence of small glints that give the interior a bright, delicate, and almost velvety appearance, creating a fascinating visual contrast with the tougher exterior. The cavity is elegantly framed by a thin white band of quartz and chalcedony, faithfully following its irregular profile. Moving toward the outside, this line fades into a notable agate structure, thick and compact. The polished surface reveals transparent blue-gray tones, deep blue areas, and suggestive green patches distributed along the edge and sides of the specimen. The alternation of these colors creates a strong visual impact: the green and blue of the agate form a deep and intense envelope, while the center opens into a clear and brilliant cavity. This geode originated millions of years ago, formed within a cavity present in an ancient volcanic rock. Fluids rich in silica slowly penetrated the empty space, progressively depositing on the walls layers of chalcedony and microcrystalline quartz. Variations in the composition of these fluids gave rise to the different bands and colors of the agate. Subsequently, quartz began to crystallize toward the center of the cavity and, thanks to traces of iron and natural irradiation, developed the delicate violet tones typical of amethyst. The polish clearly renders this geological sequence readable: from the outer structure of the agate to the thin bands of chalcedony, up to the central cavity lined with crystals, each level documents a different growth phase and contributes to the extraordinary uniqueness of the specimen. The section is splendidly presented on a black metal frame, specially made to hold it upright, highlighting its slender profile. The essential stand provides balance to the composition and focuses attention on the vibrant tones of the agate and the luminosity of the crystal cavity. An ornamental object of great elegance and scientific interest, ideal for a prestigious mineral collection or as a striking decorative element in a modern and refined environment. Any irregularities, small fractures, cavities, or color variations are to be considered part of the natural formation of the mineral and not defects. Technical data: Name: Agate Geode with Amethyst Quartz Classification: Silicate, Tectosilicate Species: Quartz (Agate and Amethyst Variety) Provenance: Brazil Material: Agate, Amethyst Quartz Work: Cutting and surface polishing; supplied with metal stand Dimensions: 375 mm (height) x 190 mm (width) x 160 mm (depth) Weight: 10164 g Conditions: Natural mineral, excellent condition Lot code: RUA-018 AOG77

Stima:€1,000

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