A large lathe-like matrix of thousands of tiny Hematite crystals showing iridescent color from the Andrade Mine in Brazil. The colors on this piece are just fabulous with scintillating rainbow of hues featuring rich green, blue, magenta and yellow-green. The play of colors on this piece are more elongate and cross the rectangular-shaped specimen at a shallow angle. Dr. George Rossman studied the mineral and discovered that the color is caused by a nano scale mineral that is epitaxial growing on the Hematite grains and the mineral has not been approved or named by the IMA because of the difficulty of providing the physical data about such a small mineral. Rock Currier was able to import one container load of this material in 1992. This is one of the better pieces he kept for his collection. At the time, the locality that was given out for the find was Belo Horizonte to protect the mine from being inundated with requests for the material. "This was a one-time occurrence, not because the material was exhausted in the mine, but because the mining of this small amount of material disrupted the mining plan of the mine [structurally] and management decided that a small sale like this one was not worth their time and effort. As an interesting aside, the mining company on occasion would scoop up a truckload or two of this colorful material and scatter it on the streets of a local small town on the occasion of a particular festival." Rock Currier stated in 2010 on a post on Mindat.org. Note - while these were common at one time, even then this would be a superior quality and huge example of the quality; so it says a lot that it was the largest keeper in Rock's collection, as he brought them out.