Orpiment

Overview

As2S3
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.49-3.56 g/cc
Hardness - Mohs	Orpiment - 1.5-2  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	yellow
Streak	pale yellow

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	-
Fracture	none
Luster	pearly

Similar Minerals

Dana Number : 02.11.01.01

Class: 02

Group: 02.11

Subgroup: 02.11.01 - orpiment

Dana Number	Mineral Name	Formula
02.11.01.01	orpiment	As2S3
02.11.01.02	getchellite	AsSbS3

Nickel-Strunz Number : 02.FA.30

Group : 02

Subgroup : FA

Nickel-Strunz Number	Mineral Name	Formula
02.FA.30	orpiment	As2S3

Specimens

Localities

Uses