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, but chalocoprite is more yellowish and lower in hardness. The black-green streak can be used.....more
specific gravity, and lower hardness. When exposed to the air and weathering, cinnabar decomposes.....more
the lower magnetism) and partly due to the distribution of empty iron unit cells (the more regular.....more
conductivity is next to that of silver, but due to lower price and availability, in the Copper Age.....more
the temperature, the more iron-rich and darker the sphalerite will become. On the other hand, the lower.....more
