Turquoise

Overview

CuAl6(PO4)4(OH)8·4(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.6-2.8 g/cc
Hardness - Mohs	Turquoise - 5.0-6.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	blue, green, gray
Streak	pale bluish white

Crystal Properties

Property	Value
Crystal structure	triclinic - pinacoidal
Cleavage	perfect
Tenacity	-
Fracture	conchoidal
Luster	waxy

Similar Minerals

Dana Number : 42.09.03.01

Class: 42

Group: 42.09

Subgroup: 42.09.03 - turquoise

Dana Number	Mineral Name	Formula
42.09.03.01	turquoise	CuAl6(PO4)4(OH)8·4(H2O)
42.09.03.02	coeruleolactite	(Ca,Cu)Al6(PO4)4(OH)8·4-5(H2O)
42.09.03.06	afmite	Al3(OH4)(H2O)3(PO4)(PO3OH)·(H2O)

Nickel-Strunz Number : 08.DD.15

Group : 08

Subgroup : DD

Nickel-Strunz Number	Mineral Name	Formula
08.DD.15	afmite	Al3(OH4)(H2O)3(PO4)(PO3OH)·(H2O)
08.DD.15	turquoise	CuAl6(PO4)4(OH)8·4(H2O)

Specimens

Localities

Uses