Chalcocite

Overview

Cu2S
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	5.5-5.8 g/cc
Hardness - Mohs	Chalcocite - 2.5-3  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	gray, black
Streak	blackish gray

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	indistinct
Tenacity	-
Fracture	conchoidal
Luster	metallic

Similar Minerals

Dana Number : 02.04.07.01

Class: 02

Group: 02.04

Subgroup: 02.04.07 - chalcocite

Dana Number	Mineral Name	Formula
02.04.07.01	chalcocite	Cu2S
02.04.07.02	djurleite	Cu31S16

Nickel-Strunz Number : 02.BA.05a

Group : 02

Subgroup : BA

Nickel-Strunz Number	Mineral Name	Formula
02.BA.05a	chalcocite	Cu2S

Specimens

Localities

Uses