Shattuckite and Mottramite
 
Locality: Omaue Mine, Opuwo Rural, Kaokoveld, Kunene Region, Namibia

Size:  76 mm x  32 mm,  62 grams
 
A beautiful and unusual Shattuckite specimen with tubular Shattuckite, perhaps a pseudomorph of another mineral. These tubular formations has Mottramite on the surface.
 
Shattuckite is a rare secondary Copper silicate mineral. It was named after the mine where it was first discovered, the Shattuck Mine, Arizona, USA.
 
The Kaokoveld plateau, part of the Kunene region, is a desert region in northern Namibia and southern Angola. The area has numerous small Copper deposits associated with Quartz veins within limestones. These smaller deposits has produced some of the best Dioptase and Shattuckite specimens in the world. Several other secondary Copper minrals are also found within these veins.