Ruby

Overview

Al2O3
Fluorescence: sometimes red under LW	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4-4.1 g/cc
Hardness - Mohs	Ruby - 9  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	red
Streak	none

Crystal Properties

Property	Value
Crystal structure	trigonal - hexagonal scalenohedral
Cleavage	none
Tenacity	-
Fracture	tough
Luster	vitreous, glassy

Similar Minerals

Dana Number : 04.03.01.01

Class: 04

Group: 04.03

Subgroup: 04.03.01 - corundum

Dana Number	Mineral Name	Formula
04.03.01.01	corundum	Al2O3
04.03.01.01	ruby	Al2O3
04.03.01.02	hematite	Fe2O3
04.03.01.03	eskolaite	Cr2O3

Nickel-Strunz Number : 04.CB.05

Group : 04

Subgroup : CB

Nickel-Strunz Number	Mineral Name	Formula
04.CB.05	brizziite-III	NaSb+5O3
04.CB.05	brizziite	NaSb+5O3
04.CB.05	corundum	Al2O3
04.CB.05	eskolaite	Cr2O3
04.CB.05	geikielite	MgTiO3
04.CB.05	hematite	Fe2O3
04.CB.05	ilmenite	Fe+2TiO3
04.CB.05	pyrophanite	MnTiO3
04.CB.05	ruby	Al2O3

Specimens

Localities

Uses