Description | Olivenite, Cu2AsO4(OH) (copper arsenate hydroxide), is a rare secondary copper mineral that is noted for its deep olive-green color, hence the name. It is found in deeply weathered, highly concentrated copper sulfide ore bodies. Olivenite is isostructural with the minerals libethenite, Cu2PO4(OH) and adamite, Zn2AsO4(OH). This means that they share the same symmetry and crystal shapes. Olivenite's olive-green color and bright luster make it a popular mineral specimen. |