Rhodochrosite is a relatively soft mineral that occurs in fractures and cavities of certain rocks.
The material used for gemstones tends to feature white streaks of calcite or concentric bands.
When cut as a cabochon, these patterns and the stone's reddish-pink colour make rhodochrosite quite easy to identify.
Some of the world's finest rhodochrosite was mined in Colorado. The Sweet Home Mine near Alma was renowned for its exceptional rhodochrosite crystals with deep red to pink colour.
The mine is, however, now closed.
Most commercial-grade rhodochrosite now comes from South America, particularly Argentina.
Fine-grade rhodochrosite crystals can exhibit pink to raspberry-red colour. Due to their rarity, they don't tend to be used for gemstones.
RAINBOW CALSILICA
