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Alla auktioner / Etnografica / Exceptional Jasper and Agate Sphere with Mesmerizing...
An Impeccable Sphere with Concentric Bands and Deep-Colored Eyes This superb sphere is a specimen of great mineralogical and aesthetic interest, finely worked from a combination of jasper and agate. Jasper is a microcrystalline variety of quartz known for its opacity and rich colorations due to mineral inclusions, while agate, also a cryptocrystalline variety of silica, stands out for its concentric bands and translucency. The geological formation of these materials is linked to hydrothermal or volcanic deposits, where silica slowly filled cavities, creating the distinctive layered structures. The piece presents an fascinating color palette, dominated by deep rust-brown and ochre tones, interspersed with semi-transparent bands of bluish-gray and white agate. Distinct “eye” or “bull’s-eye” patterns can be observed at the center, typical of dendritic or scenic agates, surrounded by horizontal bands of jasper reminiscent of sedimentary layers. The surface has been meticulously mirror-polished, highlighting the depth of colors and the complexity of the internal designs, while the translucence of the agate allows light to penetrate, revealing further structural details. Although Madagascar’s origin is known for a wide range of high-quality decorative gems and minerals, in this case the lack of precise geological data does not permit a detailed stratigraphic identification of the formation matrix. Nevertheless, the island is a geological hotspot, where tectonic and volcanic processes have favored the genesis of silica-rich sedimentary and igneous rocks, providing ideal conditions for the crystallization of these quartz varieties. From an aesthetic standpoint, this sphere stands out for its harmonious composition of natural colors and for the flawless execution of the workmanship. The symmetry of the spherical shape focuses attention on the mineral’s intrinsic patterns, inviting detailed observation of its multiple facets. The density and surface luster suggest a material of high hardness and durability, typical of quartz varieties. The piece is in excellent condition, free from significant alterations or surface defects that could compromise its aesthetic or collectible value. The impeccable polishing shows no evident scratches or abrasions, attesting to meticulous care in manufacture and conservation. The object is stable and self-supporting, ideal for display in a mineral collection or as a prestigious decorative element. The collectible value of this sphere lies in its intrinsic quality, the rarity of such a vivid and well-defined pattern, and the craftsmanship of the workmanship. Specimens of jasper and agate with these chromatic and structural characteristics are highly sought after by mineral enthusiasts and connoisseurs of natural art objects. The mineral combination is a testament to Madagascar’s geological beauty and a perfect piece to enrich any collection of polished minerals.
Utropspris:SEK 3,108.73
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Utropspris:
SEK 3,108.73
OCT 8 | 3:00 PM
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