Yellow Dogtooth Calcite – Tonglushan Mine, Daye, Hubei

Golden-Yellow Calcite is a captivating mineral known for its radiant hue and flawless crystal form. Sourced from the renowned Tonglushan Mine in Daye, Hubei, China, these crystals are a prized addition to any collection, offering both aesthetic beauty and geological significance.

Calcite belongs to the trigonal crystal system and typically exhibits a vitreous to pearly luster. Its chemical formula, CaCO₃, reflects its composition as calcium carbonate. With a Mohs hardness of 3, Calcite is relatively soft compared to many other minerals, requiring careful handling to preserve its pristine crystal surfaces. The specimens from Tonglushan Mine are distinguished by their vibrant golden-yellow coloration, transparent to translucent clarity, and well-defined scalenohedral or rhombohedral crystal forms, which highlight the mineral’s natural symmetry.

The Tonglushan Mine region is notable for producing fine mineral specimens, with these particular Calcite crystals valued for their combination of color intensity and crystal perfection. This locality’s geological environment contributes to the unique pigmentation and clarity seen in these samples. Collectors appreciate this piece for its display quality and the rarity of such well-formed, vividly colored Calcite crystals from this Chinese locality.

To maintain the specimen’s condition, it is advisable to avoid exposure to acids or prolonged moisture, as Calcite can react and deteriorate. Gentle dusting and storage away from direct sunlight will help preserve its appearance over time.

Daye, Hubei, China — historic source of malachite, azurite, and copper minerals.