Extraordinary Mineral Specimen - Pink Tourmaline on...

Magnificent natural specimen of pink tourmaline in a white quartz matrix, originating from Brazil, one of the historically most important areas in the world for the production of tourmalines of collectible quality. The specimen presents as a compact block of white quartz matrix, traversed and coated by numerous prismatic pink tourmaline crystals. The crystals show the typical elongated, striated development of tourmaline, with parallel and sub-parallel orientations in several zones of the sample. The contrast between the vivid pink of the tourmalines and the milky white of the quartz creates a highly scenographic, elegant overall appearance that is also very legible from a mineralogical standpoint. The surface of the specimen preserves a notable richness of details: elongated crystals, natural broken sections, partial terminations, small crystalline aggregates, and zones where the tourmaline appears disseminated in the matrix in a more granular way. This alternation makes the piece interesting to observe from multiple angles, because each side tells a different phase of crystallization. Pink tourmaline generally belongs to the lithium-bearing tourmaline group, in particular to the elbaite series, a lithium- and aluminum-rich variety that can develop very varied colors, from green to blue, from yellow to red-pink. The pink hues are linked to the presence of chromophoric elements such as manganese, capable of imparting to the crystal those warm and intense shades that make these specimens particularly sought after. Specimens like this form mainly in granitic pegmatites, rock environments derived from the final cooling stages of silica-rich magmas, with water and rare elements. During this final phase, residual fluids concentrate elements such as lithium, boron, aluminum, sodium, manganese, and iron. It is precisely the presence of boron that makes possible the formation of tourmaline, a chemically complex mineral and highly sensitive to the environmental conditions in which it grows. In pegmatites, crystallization often occurs in cavities or fractures where the mineralizing fluids have the space needed to deposit well-developed crystals. White quartz represents the main siliceous matrix, while tourmaline develops in prismatic crystals, often longitudinally striated, which can grow embedded in the quartz or emerge from the matrix with pronounced relief. In this specimen this geological relationship is exactly observed: pink tourmaline is intimately associated with quartz, a sign of growth occurring within the same pegmatitic system. Brazilian pegmatites have yielded exceptionally high-quality crystals, both gem-quality and mineralogical, and continue to be a fundamental reference for collectors, researchers, and enthusiasts.

Schätzpreis:€1,400

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