Colemanite

Overview

Ca2B6O11·5(H2O)
Fluorescence: yellow or blue-white under SW and LW	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.42 g/cc
Hardness - Mohs	Colemanite - 4.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, gray, white
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	brittle
Fracture	uneven
Luster	vitreous, glassy

Similar Minerals

Dana Number : 26.03.05.01

Class: 26

Group: 26.03

Subgroup: 26.03.05 - colemanite

Dana Number	Mineral Name	Formula
26.03.05.01	colemanite	Ca2B6O11·5(H2O)

Nickel-Strunz Number : 06.CB.10

Group : 06

Subgroup : CB

Nickel-Strunz Number	Mineral Name	Formula
06.CB.10	colemanite	Ca2B6O11·5(H2O)

Specimens

Localities

Uses