$1,200.00 €1,032 £870.00 approx. This specimen is priced in US dollars, all other prices are approximate.
Willemite occurs throughout the ore body at the Tsumeb mine in the Oshikoto Region of Namibia and Troostite is a manganese rich variety of this zinc silicate. This specimen is recorded to be from the 1st Oxidation Zone. Willemite at Tsumeb is mainly colourless or white, but in this small cabinet specimen forms as blue-green globular crystals up to about 5 mm diameter between which smaller reddish-brown Troostite crystals are clustered. The Troostite forms deep reddish terracotta prisms to 1 or 2 mm long in rich intergrown bundles and clusters. An excellent specimen of blue Willemite and its Mn-rich variety Troostite.