kongsbergite

\\ˈkäŋz(ˌ)bərˌgīt\ noun (-s)

Etymology: French, from Kongsberg, town in southern Norway + French -ite

: a mineral consisting of a native silver mercury amalgam

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kongsbergite Min.

(ˈkɒŋzbɜːgaɪt)

[Named, 1872, from Kongsberg in Norway, where found: see -ite.]

An amalgam of silver and mercury occurring with arquerite.

Dana Min. App. ii. 32.