Sapphirine

Overview

(Mg,Al)8(Al,Si)6O20
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.42-3.48 g/cc
Hardness - Mohs	Sapphirine - 7.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	blue, gray, green
Streak	white

Crystal Properties

Property	Value
Crystal structure	triclinic - pinacoidal
Cleavage	perfect
Tenacity	-
Fracture	uneven
Luster	vitreous, glassy

Similar Minerals

Dana Number : 69.02.01b.01

Class: 69

Group: 69.02

Subgroup: 69.02.01b - sapphirine

Dana Number	Mineral Name	Formula
69.02.01b.01	sapphirine	(Mg,Al)8(Al,Si)6O20

Nickel-Strunz Number : 09.DH.45

Group : 09

Subgroup : DH

Nickel-Strunz Number	Mineral Name	Formula
09.DH.45	aenigmatite	(Na,Ca)4(Fe+2,Ti,Mg)12Si12O40
09.DH.45	makarochkinite	Ca2Fe+24Fe+3TiSi4BeAlO20
09.DH.45	sapphirine	(Mg,Al)8(Al,Si)6O20
09.DH.45	serendibite	Ca2(Mg,Al)6(Si,Al,B)6O20

Specimens

Localities

Uses