The image above shows rock specimens from the Rausch mineral collection at UMass Amherst. When the ultraviolet light above the case of fluorescent minerals in the gallery cycles on, the specimens under glass transform from drab rocks to rock stars. Traffic-vest orange and sales-tag red, highlighter yellow and M&M blue—it’s astonishing to see such colors in nature. More than 250 minerals make up the collection that was the bequest of Marvin Rausch, professor of chemistry at UMass Amherst from 1963 to 2001. Rausch, who favored large specimens, amassed one of the finest mineral collections in New England. Learn More.