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electricity-conductive and slightly magnetic. Its magnetism is partly due to its components (the more iron.....more
and streak of graphite is black, the same as diamond, a carbon mineral. However, due to different.....more
, and sulfur; antimony may be replaced by arsen. Due to on the cleavage of {110}, bournonite has regular.....more
conductivity is next to that of silver, but due to lower price and availability, in the Copper Age.....more
is the hardest mineral known(H10). Due to the high hardness and melting point and insoluble to acidity.....more