Extremely rare manganese arsenate - Eveite. There are two or three really small crystals on this already small 1mm piece in a capsule. It is unconfirmed but I believe it is Eveite. See prov. label for more information. The main crystal is about 0.2mm in size. One photo actually has a pinhead for scale. It could very well be the real deal there not a whole lot of minerals with this type of green. I was told that the former dealer of this specimen more than likely acquired several Eveites from Harvard.