An attractive lab-grown specimen of chalcanthite featuring numerous tiny, vivid blue crystals coating a matrix of copper-bearing slag. The crystals form delicate, sparkling aggregates with a characteristic vitreous luster and intense azure coloration typical of this hydrated copper sulfate. Their fine size creates a shimmering drusy surface that contrasts beautifully with the dark, metallic-rich slag matrix. A decorative and visually striking display specimen, representing classic laboratory-grown chalcanthite in its most recognizable form. Due to the mineral’s water-soluble nature, the specimen should be kept in a dry environment and handled with care.