1.8" Manganoan Calcite Crystal Cluster and Pyrite Association - Peru

This is a cluster of pink manganoan (manganese-bearing) calcite crystals from the Pachapaqui mining district in Áncash, Peru. Under short and long wave UV, the calcite crystals fluoresce a vibrant pink-orange color. The contrast of the pink calcite with the metallic pyrite is quite nice.

Manganoan calcite, also known as manganocalcite is a pink, manganese rich variety of calcite with a chemical composition of (Ca,Mn)CO3. It crystallizes in a trigonal crystal system and forms rhombohedral or scalenohedral crystals. These crystals tend to display a pink color of which intensity can range anywhere from a pinkish-salmon to a hot pink. Often this variety of calcite will exhibit fluorescent properties.

The Huanzala mine in Bolognesi Province, Áncash, Peru is an excellent example of a mine with exceptional quality, variety and availability. Traditionally a lead-zinc mine, Huanzala holds the record for the most mineral tonnage extracted by a single mine. This is quite the feat and it's easy to see why minerals from this locality are so aggressively mined and collected.

This mine has a multitude of awesome minerals, from sharply terminated quartz, to sparkly pyrite, bubbly aragonite and dense galena. Other common minerals are realgar, orpiment, sphalerite, chalcopyrite, manganoan calcite, rhodonite, cassiterite, barite, fluorite and fluorapatite, among other less prevalent minerals. Mineral associations from this mine often contain three to four minerals that look phenomenal growing all over one another.
Calcite var. Manganoan Calcite & Pyrite
Huanzala Mine, Bolognesi Province, Áncash, Peru
1.8 x 1.5"