Cyanotrichite | fuzzy blue crystal, rare mineral specimen from ChileCyanotrichite from Chile is admired for its striking electric blue color and delicate, hair like crystal sprays that radiate across matrix surfaces. This hydrated copper aluminum sulfate forms in the oxidized zones of copper deposits, where arid conditions help preserve its fragile, fibrous habit. Chilean specimens are often associated with other secondary copper minerals, creating vivid contrasts against pale host rock or darker copper oxides. Highly