Petrified "Colla Wood", Zile, Turkey

Very rare petrified wood slice (unpolished) showing chrysocolla (light green), azurite (blue), volborthite (yellow) and cuprite (red), in addition to the typical gem silica replacement of the original wood. The wood is a white pine but the term "Colla Wood" has been coined to popularly name the material stemming from the chrysocolla present in many specimens. The petrified wood is found over a copper deposit in Turkey with only a few pieces showing this unique replacement with copper minerals (not every slice shows colourful mineralization!). Note the vuggy cavity on one side showing drusy quartz within! This piece has been sliced lengthwise along the grain of the ancient wood versus a traditional perpendicular slice. This specimen has not yet been polished. The first two photographs show the specimen wet (to bring out the colours that polishing would reveal). The final two photos show the specimen dry. We expect to polish this piece prior to year end (but a price increase will ensue when we do!). Possibly of Miocene age. Zile, Tolkat Province, Turkey. Dimensions: 18 cm x 19 cm