Wavellite with Quartz Chalcanthite The piece is clearly contacted

The piece is clearly contacted

Sigloite forms as an alteration of Paravauxite

and this is a great example of said material

Another outstanding feature is the wonderful color contrast between the vivid emerald green of the Vivianite and the altered red sandstone matrix

but crystals ON Zinkenite only existed in about 5% of the pieces found

Wavellite with Quartz Chalcanthite The piece is clearly contactedAlthough Wavellite is a fairly well known phosphate species, it is truly only found in a handful of localities in well crystallized display specimens. The majority of the Wavellites from world localities feature either micro crystals, or incomplete (broken) spheres on matrix. The Bolivian Wavellites, particularly those from the famous Siglo XX mine, are among the best in the world due to the fact that they occur with eye visible spheres that are often