7.3" Blue, Botryoidal Aragonite Formation - China

This is a beautiful formation of blue-green colored aragonite, from Yunnan Province, China. This specimen has a bizarre, silly-string like, stalactitic appearance. When viewing the mineral under UV lighting, this specimen fluoresces a faint, violet color.

This specimen comes with an acrylic display stand.

Aragonite is one of two common calcium carbonate (CaCO3) minerals: the other is calcite, of which aragonite forms as a pseudomorph. Its crystal lattice differs from calcite, resulting in a different crystal shape. It displays a translucent to white color when pure, and when impure can vary between yellow, green, pink, blue and brown. It typically forms in low-temperature hydrothermal veins, in hot springs, and as precipitates from chemicals in sedimentary rock. It can also form under biological processes: aragonite forms naturally in most mollusk shells, and as the calcareous endoskeleton most corals.
Wenshan Autonomous Prefecture, Yunnan Province, China
7.3" long, 3.6" wide