Abswurmbachite is copper-manganese silicate mineral, Jet-black with lighter brown streaks in color.
It is 6.5 on Mohs scale, meaning it is hard enough to scratch all the previous minerals in this book.
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The Complete Mineralogical Encyclopædia
Non-FictionThis is an encyclopedia on Rocks, Minerals and Fossils, providing a lot of useful information as well as *𝕊𝕖𝕝𝕗-𝕕𝕣𝕒𝕨𝕟 𝕡𝕚𝕔𝕥𝕦𝕣𝕖𝕤 𝕠𝕗 𝕖𝕒𝕔𝕙 𝕤𝕡𝕖𝕔𝕚𝕖𝕤; *𝔻𝕖𝕥𝕒𝕚𝕝𝕖𝕕 𝔻𝕖𝕤𝕣𝕚𝕡𝕥𝕚𝕠𝕟𝕤; *𝕌𝕡 𝕥𝕠 𝟝𝟘𝟘 𝕊𝕡𝕖𝕔𝕚𝕖𝕤 �...
