Origin: jawa tengah province jave Indonesia.
Size: 210 x 160 x 140 mm
Weight: 2291 gm.
Comments: Found buried on the slopes of Mt Merrimu on the Island of Java. Long iron prods are used to discover the whereabouts of these minerals by the villagers listening for the clinking sound of iron hitting stone.Believed to have derived from volcanic eruption burying the vegetation. The ensuing rich silica deposition fills in their molecular structure, and the shape of the silicified material is preserved, ie.psuedomorphed.