CYANOTRICHITE Cu4Al2SO4(OH)12·2H2O (orthorhombic) . blue to whitish fibrous mats . Coconino County, Arizona . 絨銅礬細小針狀．毛狀結晶覆蓋整個岩面上，如鋪上一層深藍色∼azure to sky blue 的地毯． 硬度３，絲狀光澤，產於銅礦的氧化地帶．少見之礦．cyano＝藍； trich＝毛髮．與 brochantite, smithsonite, malachite and azurite 伴生.

著名產地∼Laurium, Greece; Leadhills, Scotland; Russia; South Africa; Arizona, Nevada and Utah, USA and France.

經典名礦欣賞 ．２．３
NO.501