Dehydrated mica shine mica da aka samar ta hanyar ƙididdige mica na halitta a babban zafin jiki, wanda kuma ake kira calcined mica.
Mica na halitta na launuka daban-daban na iya zama bushewa, kuma kayan aikinta na zahiri da na sinadarai sun canza sosai.Canjin da ya fi dacewa shine canjin launi.Misali, farin mica na halitta zai nuna tsarin launi wanda rawaya da ja suka mamaye bayan calcination, kuma biotite na halitta gabaɗaya zai nuna launin zinari bayan ƙirƙira.