Cubic Pyrite

Spectacular mineral association with well-defined crystals and harmonious coloration — This large specimen presents a complex paragenetic association of pyrite, galena, and manganese calcite, typical of polymetallic ore deposits. The matrix is dominated by microcrystalline aggregates of galena (lead sulfide, PbS) with a gray-metallic color and sub-metallic luster, interleaved with numerous well-defined cubic pyrite (iron sulfide, FeS₂) crystals, recognizable by their distinctive brass-golden shine. Their interaction creates a mineral backdrop of great interest for the study of crystallization. The surface of this rich sulfidic association is splendidly coated by a druse of manganese calcite (CaCO₃), imparting to the specimen a coloration ranging from pale pink to pink-white. These crystals, often rhombohedral or scalenohedral in habit, appear here in botryoidal and microcrystalline aggregates, creating a delicate chromatic contrast with the darker, metallic tones of the underlying matrix. The presence of trace manganese is responsible for this peculiar and appealing pink coloration. Originating from Kručevo Dol? (Kruchev Dol), in the famous Bulgarian mines, this specimen carries geological and collecting significance. The locality is renowned for its complex mineralization and the formation of high-quality specimens, with mineral associations reflecting long-standing hydrothermal processes. Favorable geochemical conditions allowed the simultaneous and subsequent precipitation of these minerals, giving rise to aesthetically satisfying and scientifically relevant combinations. Aesthetically, the harmony between the metallic luster of pyrite and galena and the soft pink hue of manganese calcite makes this piece a collectible of high value. The uniform distribution and excellent preservation of the calcite crystals on the sulfide matrix surface enhance its intrinsic beauty, offering multiple visual focal points and details to explore under magnification. The specimen is presented in excellent condition, free from significant damage or restorations. Its structural integrity and absence of surface alterations allow full appreciation of the crystallizations’ quality and the minerals’ brilliance. The generous dimensions give it a striking visual impact, ideal for display in a collection aimed at representing the diversity and beauty of the mineral world. This piece is particularly interesting for collectors who appreciate complex mineral associations and classic deposit samples. The combination of common yet aesthetically excellent minerals, together with its provenance from a historic locality, makes it a desirable acquisition capable of enriching any collection of rare minerals or a museum collection. It represents an excellent example of systematic mineralogy and natural aesthetics.

Estimación:€650

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