Size  7cm x 6cm
 
A nice sized cabinet speciman of jackstraw cerussite crystals from the block 14 opencut in the late 1980's. Specimans of this size and crystals this big are rare these days, and are much sought after by collectors. Has only a small amount of matrix on the back of the speciman as shown in the last photo.
Quite a few of these specimans were just  clusters of cerussite crystals with no matrix, I have 2 like this in my own collection. Very hard to come by now.