Deep purple amethyst druse - Amethyst butterfly - Half of amethyst geodes arranged symmetrically. - Height: 850 mm - Width: 620 mm- 38000 g - (1)

Spectacular artistic composition of two Amethyst geodes with shining crystals and agate bands, mounted to symbolize the wings of a butterfly. A unique collectible piece from Rio Grande do Sul. — This exceptional lot features two perfectly symmetric sections of Amethyst geodes, scientifically classified as a macrocrystalline variety of quartz (SiO₂), which have been artistically worked and assembled to emulate the shape of butterfly wings. The inner cavity of each geode is densely lined with a druzy of Amethyst crystals with well-defined prismatic terminations, highlighting meticulous crystal growth within a volcanic matrix. The two halves reveal a fascinating color palette. Amethyst crystals range from pale lavender tones to intense shades of deep violet, testifying to iron impurities and the natural irradiation undergone during their formation. The geodes are edged by distinctive concentric bands of Agate, displaying color transitions from translucent white to blue-gray, creating an elegant visual contrast with the violet inner druzy. The polishing of the exposed surface enhances the glassy luster of the crystals and the refined structure of the agate bands. The origin of these magnificent geodes can be traced to Brazilian volcanic deposits, in particular basalt outcrops in the state of Rio Grande do Sul. These geological settings, characterized by extensive lava flows and hydrothermal activity, favored the formation of wide voids later filled by silica- and iron-rich fluids, which slowly crystallized over millions of years, giving rise to geodes of exceptional size and quality. Geologic dating suggests formation in the Cretaceous period, about 110 million years ago. What makes this specimen particularly remarkable is its “butterfly” configuration, achieved by selecting geodes with a natural morphology suited to such a composition. The choice of two geodes almost mirror-like in shape and size, and their integration on a metal base, create a natural work of art with a strong visual impact. The harmony of forms and the color balance enhance its aesthetics, making it a sculptural piece as well as a precious mineral. The condition is excellent, with intact and glossy crystals. The specimen is mounted on a sturdy black metal pedestal that ensures stability and highlights the overall form, making it ready for display. This support was specifically designed to present the sculpture at its best, emphasizing the delicacy and grandeur of the wings. This piece represents a unique opportunity for collectors and mineral enthusiasts seeking specimens not only of high intrinsic value due to crystal quality but also of notable artistic and decorative merit. The combination of a renowned classic provenance, imposing dimensions, and a unique design distinctly sets it apart from individual geodes, positioning it as a highly desirable natural work of art."