Production of steel and cast and wrought iron., Iron and steel, Precious, Generation of heat and electrical energy., Energy, Industrial, Jewelry, electronic component manufacturing., Precious, Non-metallic, Conductors of heat and electricity, minting of coins., Metallic, Energy, High precision jewelry and instruments., Precious stones, Non-metallic, They are used in chemical compounds and construction materials., Non-metallic, Energy, Production of articles related to electronic systems., Industrial, Precious

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