Black metallic crystal aggregates of the extremely rare copper-mercury amalgam kolymite from the the most known locality for the mineral, the Marcelita mine in Chile (Marcelita Prospect, Pabellón, Copiapó Province, Atacama Region, Chile), associated to red stained quartz. Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Kolymite
Kolymite is an IMA-recognized mineral species in the native element class, with the chemical formula Cu₇Hg₆.
It crystallizes in the cubic crystal system (space group I-43m).
Key properties: Metallic. R: (400) ~, (420) 59.0, (440) 61.4, (460) 63.8, (480) 66.8, (500) 69.4, (520) 71.2, (540) 72.1, (560) 72.8 luster.
IMA symbol Kym, IMA status: approved, named in 1979.
Found in the heavy mineral fraction of concentrates (Magadan region, USSR).
It is found associated with Copper, stibnite, berthierite, pyrite, arsenopyrite, quartz (Magadan region, USSR).
The name is derived from the locality near the Kolyma River, USSR.