• (n.) A variety of albite, whitish and slightly iridescent like a pigeon`s neck.
iridescent gemstone in the plagioclase (q.v.) series of feldspar minerals. The name (from Greek peristera, `pigeon`) refers to the resemblance of ... [1 related articles]
Pe·ris'ter·ite noun [ Greek ... a pigeon.] (Min.) A variety of albite, whitish and slightly iridescent like a pigeon's neck. 
peristerite In chemistry: A variety of albite, whitish and slightly iridescent like a pigeon's neck.