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Todas las subastas / Etnográfica / Special Deep-Violet Amethyst Crystals with Snow-White...
Impressive Collezable Specimen with Dual Crystalline Generation — This imposing amethyst geode represents a remarkable example for its mineralogical complexity and extraordinary aesthetics. The interior cavity, generously proportioned, is lined with a druse of quartz crystals of the amethyst variety, showing a chromatic transition from deep, intense violet in the upper section to lilac and more transparent tones toward the base. The crystal morphology is typical of quartz, with well-defined prismatic tips and a vitreous luster that catches the light, creating a sparkling effect. The most distinctive feature of this geode is the presence of a second generation of mineralization: a deposit of microcrystalline quartz in a pure, opaque white, which developed above and among the amethyst crystals, predominantly in the lower portion of the cavity. This secondary formation creates an exceptional color and textural contrast with the translucent violet of amethyst, highlighting the different growth stages and the variable geochemical conditions inside the geode over millions of years. Coming from the famous volcanic formations of Brazil, this geode testifies to the hydrothermal processes that favored the deposition of silica in iron- and manganese-rich solutions, responsible for the violet coloration of amethyst. The inclusion of white microcrystalline quartz suggests a change in environmental conditions or in the composition of the mineralizing fluids at a later stage of its formation, a detail of great interest to mineralogy experts. Aesthetically, the alternation between areas of deep amethyst and the white, more compact and granular surfaces gives the piece rare visual dynamism. The cut and polished base allows stable display and highlights the entire cavity, turning this geode into a focal point for any environment. The structural integrity of the geode is excellent, with well-formed crystals free of significant damage, evidence of optimal preservation. The outer shell consists of basalt or altered volcanic rock, typical of Brazilian deposits, providing solid support and an additional element of geological authenticity. This specimen is not only an object of superb decorative beauty but also a museum piece due to its ability to illustrate complex geological processes. The combination of substantial dimensions, high crystal quality, and the peculiar two-stage formation makes it a prestigious addition for discerning collectors, investors in rare minerals, or anyone wishing to own a spectacular fragment of Earth's geological history.
Estimación:€8,300
Ir a la subastaVer todos los artículos deCatawikioEtnográfica
Estimación:
€8,300
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