By Antoinette Rahn
This specimen of arsendescloizite on mimetite caught my attention originally because of its unique color and patterns. However, a close second in terms of reasons for appeal is the name. I had to learn more about the naming convention.
The name is inspired by its composition, as a secondary mineral that appears in oxidized hydrothermal polymetallic deposits, as well as its membership as an arsenate analogue in the Adelite-Descloizite Group, according to information at www.webmineral.com.
The featured specimen boasts rich green crystallized botryoidal arsendescloizite covering the matrix with segments of yellow crystallized mimetite present throughout.