Rhodochrosite

Rhodochrosite is a stunning pink to rose-red carbonate mineral often referred to as the 'Inca Rose' (Rosa del Inca). It is prized for its beautiful colors and distinctive 'bacon-strip' banding when found in stalactitic forms. While typically pink, rare gem-quality transparent red crystals are among the most sought-after specimens by mineral collectors worldwide.

Formation & Geology

Rhodochrosite forms in hydrothermal veins associated with silver, copper, and lead deposits. It also occurs in high-temperature metamorphic rocks. The banded variety forms as stalactites and stalagmites in caves and mines over thousands of years. Its color is caused by manganese, which is a key component of its chemical structure.

Physical Characteristics

With a hardness of only 3.5 to 4, rhodochrosite is relatively soft and fragile. Like calcite (to which it is related), it has perfect rhombohedral cleavage, meaning it splits easily into diamond-like shapes. It has a vitreous to pearly luster. Most ornamental rhodochrosite is translucent with concentric pink and white bands, while the rare faceted gems are transparent and deep cherry-red.

Historical Significance & Uses

The Incas believed that rhodochrosite was the solidified blood of their ancestral kings and queens. Today, it is the national gemstone of Argentina and the state mineral of Colorado. It is used extensively for carvings, beads, and cabochons. Due to its softness, it is best suited for jewelry that isn't subject to hard wear, like earrings and pendants. It is also an important minor ore of manganese.