BLACK QUARTZ – Very Dark Smoky Quartz with golden PYRITE and DOLOMITE, Romania

Exceptional natural Quartz, Dolomite and Pyrite specimen from the Cavnic Mine, Maramureș County, Romania. This remarkable mineral association is characterized by a compact and highly developed crystal formation featuring dark quartz crystals partially covered by light dolomite, combined with a striking spherical aggregation of metallic pyrite. The strong contrast between blackish quartz, golden pyrite and pale pink-white dolomite creates a highly scenic and visually dynamic composition. The specimen shows excellent crystal definition, depth and three-dimensional structure, making it highly desirable for advanced mineral collections and high-end display pieces. Its size, mineral complexity and classic Romanian locality enhance its value and aesthetic appeal.

Quartz is a silicate mineral composed of silicon dioxide with the chemical formula SiO₂ and belongs to the tectosilicate group, crystallizing in the trigonal system. Dolomite is a carbonate mineral with the chemical formula CaMg(CO₃)₂ and crystallizes in the trigonal system. Pyrite is an iron sulfide mineral with the chemical formula FeS₂ and crystallizes in the cubic (isometric) system. These minerals commonly form together in hydrothermal systems where silica-rich, carbonate-rich and sulfur-bearing fluids interact under varying physicochemical conditions, producing complex multi-mineral assemblages.

• Chemical formula: SiO₂ (Quartz), CaMg(CO₃)₂ (Dolomite), FeS₂ (Pyrite)
• Mineral class: Silicates, Carbonates, Sulfides
• Crystal system: Trigonal (Quartz, Dolomite), Cubic (Pyrite)
• Formation: Hydrothermal veins with mixed silica-carbonate-sulfide fluids
• Key elements: Silicon (Si), Oxygen (O), Calcium (Ca), Magnesium (Mg), Iron (Fe), Sulfur (S), Carbon (C)
• Crystal habit: Quartz crystals with dolomite coating and pyrite aggregates
• Color: Dark grey/black, white-pink, metallic gold

Pyrite often forms spherical or botryoidal aggregates in hydrothermal environments, especially when iron-rich fluids crystallize rapidly under fluctuating temperature and chemical conditions.

Quartz is traditionally associated with clarity, energy amplification and balance. Dolomite is linked with emotional calm and grounding, while Pyrite is often associated with protection, confidence and motivation. Together, this combination is symbolically interpreted as a powerful triad of stability, mental clarity and energetic strength.

Photos: All photographs are taken under professional lighting conditions to accurately highlight crystal structure, color and detail. However, slight variations in tone and appearance may occur depending on screen calibration and ambient lighting conditions.

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