Large slice of Brazilian amethyst geode on a stand...

Spectacular polished section of Brazilian geode on a metal base — This specimen catches the eye with its sinuous and distinctive shape, reminiscent of a stylized figure or an infinity symbol. It is a polished section of an amethyst geode from Brazil, carefully prepared to reveal its internal splendor. The external surface, displaying its natural bands of gray‑white agate and occasional inclusions of greenish chalcedony, contrasts magnificently with the crystalline opulence of its heart. The geode's interior is a true spectacle of natural beauty, lined with thousands of amethyst crystals. These crystals, with their well-defined tips and glassy luster, vary in hue from pale lilac to deep violet, creating a vibrant and captivating color effect. The crystallization is dense and uniform, a testament to a geological formation process lasting millions of years in stable conditions. Amethyst is a variety of quartz (SiO₂) whose violet coloration is attributed to the presence of iron impurities and, in part, to natural radiation. It typically forms in geodes and cavities within volcanic rocks, such as basalts, where hydrothermal solutions rich in silica and iron slowly deposit the minerals. Brazil, particularly the state of Rio Grande do Sul, is renowned for producing high-quality amethyst geodes, often featuring considerable sizes and well-formed crystals. The workmanship of this geode, with the cutting and polishing of its section, highlights its internal geometry and the luster of the crystals, making it an ideal piece for display. The included metal base supports it stably, allowing full appreciation of its verticality and the complexity of its shape. It is a piece that combines breathtaking aesthetics with geological history, perfect for enriching any mineral collection or as a striking decorative element. This specimen represents a unique opportunity for collectors and nature lovers to own a fragment of the planet's geological magnificence. Its notable size and particular aesthetic make it a focal point in any environment, evoking the intrinsic beauty of the mineral world and the timeless allure of its treasures.

Estimation:€750

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