This is a rare DOUBLE REPLACEMENT the likes of which is only found at Tsumeb. Two crystals, one rather fat and large at 5.5 cm in length, have grown parallel to each other. These crystals grew as azurite crystals which were later altered to malachite and then still changed again as the pocket chemistry changed, into this magnificent, turquoise blue rosasite. The specimen is studded with small gemmy crystals of cerussite, to .5 cm across. A small area of bruising on the back side of the main crystal in no way detracts from the frontal display of this incredible pseudomorph. The front is very 3-D and in good shape save for a small contact on the upper-left edge where there is an attached bit of cerussite (but not damage to the rosasite itself). These specimens are rare, and hard to obtain in any kind of quality. This pleasing light blue color is the most desired.