Cobaltoan Calcite // 1.69 Lb.

This rare specimen showcases a thick coating of Cobaltoan calcite with relatively large, beautifully crystallized formations. Both sides of the host rock are covered in the mineral, offering incredible natural sparkle and luster. The vivid magenta hue, the best seen in this species to date, is a result of cobalt ions substituting for calcium ions in the calcite's crystal lattice. Adding to its uniqueness, this piece features a few deep green, lustrous malachite crystals growing over the pink Cobaltoan calcite, creating a striking visual contrast. Sourced from Zaire, this remarkable specimen highlights the exceptional mineralization of copper and cobalt in the region. A true treasure for any mineral enthusiast.
Interesting Facts
Cobaltoan calcite’s bright magenta hue is caused by cobalt “impurities” in its crystal lattice, making it highly sought after by collectors.
Malachite forms in association with copper-rich deposits, providing a velvety green contrast to the vibrant pink calcite.
Zaire (now the Democratic Republic of Congo) is known for producing world-class mineral specimens, especially those featuring unique color combinations.
Features
Origin: Zaire (Democratic Republic of Congo)
Material: Cobaltoan calcite with malachite on host rock
Condition: Excellent, with vibrant pigmentation and large, intact crystals
Special Characteristics: Double-sided calcite coating, bright magenta hues, and malachite contrast
Dimensions and Weight
Height        Length        Depth        Weight
3.75"        4.75"        2.25"        1.69 lb
Just in Astro West.