Large polished sphere in unakita - Pink feldspar, green epidote, and quartz - Height: 100 mm - Width: 100 mm- 1456 g - (1)

Pink Feldspar, Green Epidote, and Quartz — This lot features a magnificent Unakite sphere of remarkable size, originating from Madagascar. The specimen has been expertly worked and mirror-polished to achieve a perfect spherical shape, highlighting its complex internal tessellation. The sphere, with a diameter of 100 mm and a weight of nearly one and a half kilos, stands out as a visually and tactually imposing object, a true geological microcosm to explore. Direct observation reveals the characteristic and fascinating chroma of Unakite. The surface is a natural mosaic where areas of deep pistachio green, due to Epidote, alternate and blend with patches of warm pink-salmon, corresponding to Orthoclase Feldspar. Between these two dominant colors, small translucent and grayish Quartz crystals are inserted, completing the composition of this metamorphic rock. The impeccable polishing not only gives the object a glassy luster but also allows appreciation of the depth of the patterns. On the surface one can notice thin natural fracture lines, testimonies of the stone’s geological history, which do not compromise its integrity but enrich its authenticity. Unakite is not a single mineral, but a rock, specifically granite altered through a metamorphic process called metasomatism. Its origin is linked to the action of hydrothermal fluids that, infiltrating an existing granitic rock, chemically transformed some of its components. Plagioclase feldspar was replaced by green Epidote, while Orthoclase feldspar retained its pink color. The result is this extraordinary mineral aggregation, a tangible example of the powerful transformative forces at work within the Earth’s crust. The spherical shape represents one of the pinnacles of lapidary art. It requires precision and patience to transform a block of rough rock into a perfect geometry, without edges or interruptions. This workmanship allows the rock to be admired from every possible angle, offering a continuous and ever-changing view of its internal structure. Rolling the sphere in the hands gives the sensation of holding a small planet, whose color patches evoke continents and oceans of a fantastic geological world. As a collectible object, this Unakite sphere is a piece of great interest. Its size and weight make it a standout specimen for any display. In addition to its value for mineral enthusiasts, it is also a superb decorative element, capable of enriching a study, a library, or a contemporary interior with a touch of natural elegance. Placed on a base or simply resting on a surface, it becomes a focal point of conversation, a bridge between design and natural history, perfect for a modern "cabinet of curiosities".