Eudidymite

Overview

NaBeSi3O7(OH)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.553 g/cc
Hardness - Mohs	Eudidymite - 6  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	blue, colorless, purple, gray, yellow
Streak	white

Crystal Properties

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

Similar Minerals

Dana Number : 66.03.01.03

Class: 66

Group: 66.03

Subgroup: 66.03.01 - xonotile

Dana Number	Mineral Name	Formula
66.03.01.01	xonotlite	Ca6Si6O17(OH)2
66.03.01.03	eudidymite	NaBeSi3O7(OH)
66.03.01.05	yuksporite	(Sr,Ba)2K4(Ca,Na)14(Mn,Fe){(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3}(H2O,OH)3
66.03.01.07	chivruaiite	Ca4(Ti,Nb)5((Si6O17)2)((OH,O)5)·13-14(H2O)

Nickel-Strunz Number : 09.DG.60

Group : 09

Subgroup : DG

Nickel-Strunz Number	Mineral Name	Formula
09.DG.60	eudidymite	NaBeSi3O7(OH)

Specimens

Localities

Uses