Chuquicamata Mine, Calama, El Loa Province
5.6 x 4 x 2.7 CM (small cabinet/ large miniature)
new year 2021
Bright blue to blue green masses of glassy Krohnkite from the type locality at Chuquicamata. A very colorful and rare mineral, this Copper Sulfate was only found in display grade specimens long ago. From every other locality worldwide I am unaware of any specimens over a few millimeters in size. This specimen is rich and colorful on all sides, there are no distinct crystals just masses and seams of Krohnkite.
Bright, large blocky habit Krohnkite crystals in a cluster with minimal matrix. From the type locale, Chuquicamata which is the only place where this rare Copper Halide was ever found in such fine crystals. While and non micro crystals are rare most of those are fibrous growths or slender clusters. Prismatic habits like this are far more uncommon, and were all found long ago. Most of the existing specimens were collected long before 1934 (the early 1900 era was most productive) but it is probable a few came out later. The zone where these were found was long ago disappeared, consumed by the largest open pit mine on the planet. Only seen now from old collections.