This Specimen has been sold.
3.9" Sky-Blue, Botryoidal Aragonite Formation - China
This is a beautiful formation of sky-blue colored aragonite, from Yunnan Province, China. This specimen has a bizarre, silly-string like, botryoidal appearance. When viewing the mineral under UV lighting, this specimen fluoresces a faint, violet color.
Aragonite is a carbonate mineral with the chemical composition of CaCO3. It is a pseudomorph after calcite and varies in colors depending on impurities. It displays a translucent to white color when pure, and when impure can vary between yellow, green, pink, blue and brown. Typically forming in low temperature hydrothermal veins, It is also known to form in hot springs, as precipitates from chemicals in sedimentary rock, and in some cases as crystals in fossilized sea creatures.