Watch the Video on YouTube

NAILHEAD CALCITE – San Giovanni Mine, Domusnovas (SU) – Sardinia, Italy

Outstanding specimen of scalenohedral calcite ("nailhead calcite") from the renowned San Giovanni Mine of Domusnovas, in the province of South Sardinia — one of the most iconic localities for this morphological variety in Italy and among the most sought-after worldwide by serious collectors.

The piece presents itself as a large multi-crystal aggregate, with well-developed scalenohedral crystals featuring robust and characteristic terminations, arranged in a particularly scenic crown-like structure. The crystal surfaces display a typical granular beige-cream patina, testament to the rich mineralization of the formation environment, with hints of matrix at the base that enhance its natural character.

Highlights of the specimen:

• Remarkable size — a museum-quality display or collection centerpiece
• Intact crystals with well-defined scalenohedral faces
• Balanced and imposing overall aesthetic
• Verified and documentable provenance from a historic Sardinian mine
• Photographed with Paleofox metric scale for dimensional reference

Perfect for systematic mineralogy collections, thematic collections focused on Sardinian mineralogy, or as a high-impact display piece.

Carefully packed for shipping. Additional photos available upon request.