star-cut teal cubic zirconia - specific gravity values
star-cut teal cubic zirconia - specific gravity values

Specific Gravity Values of Selected Gems


Measuring specific gravity helps gemologists identify gemstones. The following table lists the specific gravity values for a variety of gem materials.

3 Minute Read

In order to identify gemstones, gemologists often measure their density or specific gravity. The following table lists the specific gravity values for a variety of materials commonly found in gem and jewelry collections, as well as for some materials more rarely encountered.
star-cut teal cubic zirconia - specific gravity values
Lab-created cubic zirconia (CZ) can be used to imitate the appearance of many gemstones. Although most well-known as a diamond simulant, this material can be manufactured in different colors, like this teal, star-cut piece. However, CZ's properties still differ from those of other gems, so gemologists can usually distinguish them. Most notably, CZ's specific gravity far exceeds that of most gemstones. Photo by humanfeather. Licensed under CC By 3.0.

Table of Specific Gravity Values

GemstoneDensity
Gold15.50-19.30
Thorianite9.70-9.80
Silver9.60-12.00
Algondonite8.38
Bismutotantalite8.15-8.89
Cinnabar8.00-8.20
Stolzite7.90-8.34
Niccolite7.78
Manganotantalite7.73-7.97
Melonite7.72
Breithauptite7.59-8.23
Stibiotantalite7.53
Mimetite7.24
Huebnerite7.12-7.18
Wolframite7.10-7.60
Gadolinium gallium garnet (GGG)*7.00-7.09
Cassiterite6.70-7.10
Wulfenite6.50-7.00
Vanadinite6.50-7.10
Cerussite6.46-6.57
Cobaltite6.33
Anglesite6.30-6.39
Phosgenite6.13
Simpsonite5.92-6.84
Scheelite5.90-6.30
Crocoite5.90-6.10
Cuprite5.85-6.15
Pyrargyrite5.85
Yttrotantalite5.70
Zincite5.66
Proustite5.51-5.64
Descloizite5.50-6.20
Chalcosite5.50-5.80
Cubic zirconia (CZ)*5.50-6.00
Millerite5.50
Fergusonite5.35-5.44
Euxenite5.30-5.90
Linarite5.30
Senarmontite5.20-5.50
Magnetite5.20
Aeschynite5.19
Tantalite5.18-8.20
Hematite5.12-5.28
Fabulite (Tausonite)5.11-5.15
Bornite5.06-5.08
Boleite5.05
Samarskite5.00-5.69
Pyrite5.00-5.20
Monazite4.98-5.43
Bixbyite**4.93
Marcasite4.83-4.92
Greenockite4.73-4.79
Psilomelane (Manganese oxide)4.70-4.74
Linobate (Lithium niobate)*4.64-4.66
Pentlandite4.60-5.00
Covellite4.60-4.76
Yttrium aluminum garnet (YAG)*4.55-4.65
Ilmenite4.50-5.00
Pyrolusite4.50-5.00
Chromite4.50-4.80
Davidite4.50
Barite4.43-4.46
Magnesiochromite4.39-4.67
Bayldonite4.35
Parisite4.33-4.42
Microlite4.30-5.70
Adamite4.30-4.68
Witherite4.27-4.79
Galaxite4.23
Powellite4.23
Rutile4.20-4.30
Spessartite garnet4.12-4.18
Shattuckite4.11
Chalcopyrite4.10-4.30
Wurtzite4.09
Brookite4.08-4.18
Hancockite4.03
Painite4.01
Gadolinite4.00-4.65
Smithsonite4.00-4.65
Gahnite4.00-4.62
Legrandite3.98-4.04
Ruby3.97-4.05
Celestite3.97-4.00
Libethenite3.97
Ferrosilite3.96
Sapphire3.95-4.03
Durangite3.94-4.07
Zircon3.93-4.73
Almandine garnet3.93-4.30
Hodgkinsonite3.91-3.99
Sphalerite3.90-4.10
Willemite3.89-4.18
Tephroite3.87-4.12
Siderite3.83-3.96
Anatase3.82-3.97
Goethite3.80-4.30
Gaspéite3.71
Andradite garnet3.70-4.10
Azurite3.70-3.90
Periclase3.70-3.90
Chrysoberyl (Cat's eye, Alexandrite)3.70-3.78
Schorlomite***3.69-3.88
Barytocalcite3.66
Staurolite3.65-3.77
Benitoite3.64-3.68
Strontianite3.63-3.79
Pyrope garnet3.62-3.87
Pyroxmangite3.61-3.80
Holtite3.60-3.90
Taafeite3.60-3.62
Grossular garnet3.56-3.73
Realgar3.56
Spinel3.54-3.63
Kyanite3.53-3.70
Nambulite3.53
Sphene (Titanite)3.52-3.54
Allanite3.50-4.20
Aegirine3.50-3.60
Hedenbergite3.50-3.56
Diamond3.50-3.53
Topaz3.49-3.57
Chambersite3.49
Sinhalite3.46-3.50
Rhodochrosite3.45-3.70
Piedmontite3.45-3.52
Euchroite3.44
Rhodizite3.44
Serendibite3.42-3.52
Uvarovite garnet3.41-3.52
Rhodonite3.40-3.74
Lithiophilite3.40-3.60
Sapphirine3.40-3.58
Aegirine-augite3.40-3.55
Hypersthene3.40-3.50
Chromdravite3.40
Scorzalite3.38
Tinzenite3.36-3.43
Tanzanite3.35
Triphylite3.34-3.58
Dickinsonite3.34-3.41
Idocrase (Vesuvianite)3.32-3.47
Bustamite3.32-3.42
Serandite3.32
Manganaxinite3.31
Epidote3.30-3.50
Hemimorphite3.30-3.50
Diaspore3.30-3.39
Jadeite3.30-3.38
Peridot3.28-4.39
Dioptase3.28-3.35
Ekanite3.28-3.32
Jeremejevite3.28-3.31
Parascorodite3.28-3.29
Forsterite3.28
Kornerupine3.27-3.45
Dumortierite3.26-3.41
Axinite3.26-3.36
Povondraite3.28
Malachite3.25-4.10
Ferroaxinite3.25-4.10
Papagoite3.25
Smaragdite3.24-3.50
Sillimanite3.23-3.27
Diopside3.22-3.38
Väyrynenite3.22
Weloganite3.22
Clinozoisite3.21-3.28
Helvite3.20-3.44
Purpurite3.20-3.40
Humite3.20-3.32
Enstatite3.20-3.30
Neptunite3.19-3.23
Clinoenstatite3.19
Rinkite3.18-3.44
Pumpellyite3.18-3.33
Magnesioaxinite3.18
Norbergite3.18
Chlorapatite3.17-3.18
Chondrodite3.16-3.26
Apatite3.16-3.23
Strass3.15-4.20
Zoisite (non-Tanzanite)3.15-3.36
Spodumene (Hiddenite, Kunzite)3.15-3.21
Hureaulite3.15-3.19
Sellaite3.15
Clinohumite3.13-3.75
Fluorapatite3.10-3.25
Moissanite (Carborundum)*3.10-3.22
Ludlamite3.10-3.20
Euclase3.10
Lawsonite3.08-3.09
Phosphophyllite3.07-3.13
Friedelite3.06-3.19
Andalusite3.05-3.20
Eosphorite3.05-3.08
Pargasite3.04-3.17
Lazulite3.04-3.14
Actinolite3.03-3.44
Spurrite3.02
Amblygonite3.01-3.11
Fluorite3.00-3.25
Meliphanite3.00-3.03
Leucophanite3.00
Schlossmacherite3.00
Chiolite2.99-3.01
Montebrasite2.98-3.11
Brazilianite2.98-2.99
Richterite2.97-3.45
Danburite2.97-3.03
Ankerite2.97
Cryolite2.97
Magnesite2.96-3.12
Tremolite2.95-3.07
Herderite2.95-3.02
Phenakite2.95-2.97
Boracite2.95-2.96
Aragonite2.94
Vlasovite2.92-2.96
Sarcolite2.91-2.96
Hornblende2.90-3.40
Nephrite2.90-3.03
Datolite2.90-3.00
Anhydrite2.90-2.98
Prosopite2.88-2.89
Hurlbutite2.88
Zunyite2.87
Wollastonite2.86-3.09
Grandidierite2.85-3.00
Pollucite2.85-2.94
Langbeinite2.83
Tourmaline2.82-3.90
Prehnite2.82-2.94
Wardite2.81-2.87
Dolomite2.80-2.95
Lepidolite2.80-2.90
Beryllonite2.80-2.87
Zektzerite2.79
Muscovite2.78-2.88
Sogdianite2.76-2.90
Sugilite2.76-2.80
Sekaninaite2.76-2.77
Ammolite2.75-2.80
Eudialyte2.74-2.98
Pectolite (Larimar)2.74-2.88
Meionite2.74-2.78
Bytownite2.72-2.74
Catapleiite2.72
Creedite2.72
Xonotlite2.71-2.72
Canasite2.71
Ceruleite2.70-2.80
Augelite2.70-2.75
Calcite2.69-2.71
Aquamarine2.68-2.74
Emerald2.67-2.78
Precious Beryl****2.66-2.87
Pyrophyllite2.65-2.90
Labradorite2.65-2.75
Andesine2.65-2.69
Quartz (Amethyst, Citrine, Prasiolite, Rock crystal, Rose quartz, Smoky quartz)2.65
Vivianite2.64-2.70
Aventurine2.64-2.69
Kämmererite2.64
Oligoclase2.62-2.67
Sunstone2.62-2.65
Pearl2.60-2.85
Coral2.60-2.70
Agate2.60-2.64
Schaurteite2.60
Peristerite2.59-2.68
Petrified wood2.58-2.91
Jasper2.58-2.91
Cordierite2.58-2.66
Chalcedony2.58-2.64
Chrysoprase2.58-2.64
Moss agate2.58-2.64
Tiger's eye2.58-2.64
Scapolite2.57-2.74
Anorthoclase2.75-2.60
Moonstone2.56-2.59
Amazonite2.56-2.58
Orthoclase2.56-2.58
Sanidine2.56-2.58
Talc2.55-2.80
Nepheline2.55-2.65
Lizardite2.55
Charoite2.54-2.78
Microcline2.54-2.57
Clinochrysotile2.53
Lapis lazuli2.50-3.00
Marialite2.50-2.62
Milarite2.46-2.61
Howlite2.45-2.58
Leucite2.45-2.50
Carletonite2.45
Serpentine2.44-2.62
Variscite2.42-2.58
Haüyne2.40-2.50
Colemanite2.40-2.42
Petalite2.40
Brucite2.39
Tugtupite2.36-2.57
Wavellite2.36
Obsidian (natural glass)2.35-2.60
Hambergite2.35
Moldavite (natural glass)2.32-2.38
Turquoise2.31-2.84
Apophyllite2.30-2.50
Thomsonite2.23-2.39
Analcime2.22-2.29
Palygorskite2.21
Cacoxenite2.20-2.60
Gypsum2.20-2.40
Zeolite (Natrolite, Mesolite, Scolecite)2.20-2.29
Whewellite2.19-2.25
Yugawaralite2.19-2.23
Stichtite2.16-2.18
Sodalite2.14-2.40
Mordenite2.12-2.15
Chabazite2.05-2.20
Sulfur2.05-2.08
Glass (artificial)*2.00-4.50
Chrysocolla2.00-2.40
Sepiolite2.00-2.10
Gaylussite1.99
Opal1.88-2.50
Thaumasite1.91
Kurnakovite1.86
Sturmanite1.85
Inderite1.78-1.86
Ettringite1.77
Ulexite1.65-1.95
Mellite1.64
Jet1.19-1.35
Amber1.05-1.09

Notes

* Lab-created gem material.

** This is not bixbite, the gemstone better known as red beryl.

*** Non-gem garnet species.

**** Non-aquamarine/non-emerald varieties of beryl.


International Gem Society

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

Get Gemology Insights

Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!