This smithsonite specimen exhibits two generations of growth, with the top generation of rich blue botryoidal smithsonite being very similar to the best of the Kelly Mine in color and even in rich silky luster! The blue smithsonite overlays an earlier generation of orange-brown smithsonite which, frankly, is the only clue that this isn't just in fact a really good Kelly Mine piece! It certainly fooled me on first glance, and this particular shade and style was very uncommon in the find (according to Benny Fenn, this is the best piece of the habit and he had kept it aside for his collection), making this a special piece. 12 x 10.3 x 9 cm