共生金属是指共存于矿石中的两种或两种以上有价值的金属。通过相应的冶金过程，可由矿石或精矿经分离、纯化以制取纯金属；在提取主要金属的过程中综合回收其他有价值的金属；也可由矿石或精矿直接获得共生金属组成的合金。如由独居石制取钍和混合稀土金属；由黑稀金矿经提取、分离、纯化而得金属钽和铌；由辉钼矿回收铼。
矿床银矿物种类多且含量高，共生金属矿物富含银。
There are many kinds of Agminerals in high content with Ag-rich paragenetic metallic minerals.
自然界中可能不存在纯铱，通常和其它贵金属共生于天然合金中。
Iridium probably does not occur uncombined in nature but it is found in natural alloys with other noble metals.
盐类与金属、油气、固体非金属矿床经常相互共生，在其成矿过程中起到了不可忽视的作用。
Salts are generally in association with gas-oil reservoirs, solid metal and non-metal ore deposits and the roles of salt in the ore-forming processes can not be neglected.
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