One is a copper sulfate assemblage, which is generally associated with copper carbonates, cuprite, sulfides , boltwoodite, and metazeunerite.
Most pure metals, when freshly cut to expose a new surface, are lustrous, but most lose this luster quickly by combining with oxygen, carbon dioxide or hydrogen sulfide to form oxides, carbonates or sulfides .
বর্ণমালা অনুযায়ী ইংরেজি শব্দ ব্রাউজ করুন (A-Z Dictionary):