A very rare specimen of a type not often found here, featuring yellow-green crystals of unusual size and isolation on contrasting gossan matrix. Marty had a number of these, all of which I bought. This one features a large, lustrous crystal to about an inch perched nicely on matrix. It is a superb display-quality miniature of great import for the species and locality. Marty's collection was world-famous for his suite of Mexican minerals but of those he was most proud of and dedicated to building the adamite suite. This is a significant pedigree for a Mexican adamite, but its a quality piece in and of itself, as well.