Thulite

Overview

Ca2Al3(SiO4)3(OH)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.3 g/cc
Hardness - Mohs	Thulite - 6.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	gray, green, brown, blue, red
Streak	white

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	perfect
Tenacity	-
Fracture	even
Luster	vitreous, pearly

Similar Minerals

Dana Number : 58.02.01b.01

Class: 58

Group: 58.02

Subgroup: 58.02.01b - zoisite

Dana Number	Mineral Name	Formula
58.02.01b.01	tanzanite	Ca2Al3(SiO4)3(OH)
58.02.01b.01	thulite	Ca2Al3(SiO4)3(OH)
58.02.01b.01	zoisite	Ca2Al3(SiO4)3(OH)

Nickel-Strunz Number : 09.BG.10

Group : 09

Subgroup : BG

Nickel-Strunz Number	Mineral Name	Formula
09.BG.10	tanzanite	Ca2Al3(SiO4)3(OH)
09.BG.10	thulite	Ca2Al3(SiO4)3(OH)
09.BG.10	zoisite	Ca2Al3(SiO4)3(OH)

Specimens

Localities

Uses