This Specimen has been sold.
2.9" Vibrant Blue, Cyanotrichite with Fluorite Crystals - China
These are beautiful, vibrant blue cyanotrichite aggregates that formed in association with fluorite crystals, collected from the Qinglong Mine in the Guizhou Province of China. It has been mounted to an acrylic display base with glue.
Cyanotrichite is a hydrous copper aluminum sulfate with the chemical formula Cu4Al2SO4(OH)12 · 2H2O. It is a secondary mineral in copper oxidation zones and is primarily found as spherical aggregates of blue, radiating acicular crystals. Due to the fragility of Cyanotrichite crystals, it's suggested that specimens are placed in a safe location and handled carefully.