Cobaltoan Calcite and Hemimorphite Pair, Yunnan, China

Cobaltoan Calcite meets Hemimorphite in this captivating crystal duo originating from the mineral-rich province of Yunnan, China. This rare specimen features cobalt-substituted calcite, known for its distinctive soft pink rhombohedral crystals, which belong to the trigonal crystal system and exhibit a vitreous luster. With a Mohs hardness of 3, calcite is relatively soft, requiring careful handling to preserve its delicate surfaces. The accompanying hemimorphite presents vibrant blue crystals with a botryoidal to crystalline form, characteristic of its orthorhombic crystal system and a hardness of 4.5 to 5. Both minerals display translucent to transparent qualities, highlighting their natural beauty through contrasting colors and crystal habits.

The Yunnan region is renowned for producing exceptional mineral specimens, and this pair stands out due to its uncommon cobalt content in calcite and the vivid hemimorphite’s well-formed crystals. This combination offers mineral collectors a unique opportunity to acquire a specimen that balances aesthetic appeal with geological significance. Its rarity and display quality make it a valuable addition to any crystal collection.

For preservation, it is recommended to keep the specimen away from acidic environments and to handle it gently to avoid scratching or damaging the softer calcite crystals. Displaying the pair in a stable environment free from excessive moisture will help maintain its condition over time.

China — dominant modern source for collector-grade specimens since the 1990s.