Mohs scale of hardness - extended

Mohs scale of hardness - extended

Material	Hardness
Plastic	1
Graphite	1
Talc	1
Pencil lead	1
Sulfur	1½-2½
Gypsum	2
Alabaster	2
Rock salt	2
Plaster of Paris	2
Mercury	2-2½
Salt	2-3
Amber	2½
Ivory	2½
Fingernail	2½
Pearl	2½
Zinc	2½
Gold	2½-3
Silver	2½-3
Aluminum	2½-3
Jet	2½-3
Copper penny	3
Calcite	3
Limestone	3
Shells	3
Bronze	3
Coral	3
Barite	3-3½
Malachite	3½-4
Azurite	3½-4
Fluorite	4
Platinum	4-4½
Iron	4-5
Meteorite	4½
Palladium	4¾
Apatite	5
Tooth enamel	5
Lapis	5-5½
Obsidian	5-5½
Hematite	5-6
Knife blade	5½
Opal	5½-6
Turquoise	5½-6
Magnetite	5½-6½
Rhodonite	5½-6½
Titanium	6
Rhodium	6
Feldspar	6
Orthoclase	6
Rutile	6-6½
Fire Opal	6-6½
Moonstone	6-6½
Marcasite	6-6½
Iron Pyrite	6½
Tanzanite	6½
Nephrite	6-7
Jade	6-7
Glass	6-7
Cassiterite	6-7
Iridium	6½
Kunzite	6½-7
Peridot	6½-7
Bloodstone	7
Quartz	7
Rose Quartz	7
Smokey Quartz	7
Milk Quartz	7
Black Opal	7
Flint	7
Aventurine	7
Ametrine	7
Agate	7
Chalcedony	7
Citrine	7
Jasper	7
Onyx	7
Carnelian	7
Amethyst	7
Tiger's Eye	7
Garnet	7-7½
Rhodolite	7-7½
Iolite	7-7½
Tourmaline	7-7½
Morganite	7-8
Steel File	7-8
Zircon	7½
Tungsten	7½
Beryl	7½-8
Aquamarine	7½-8
Emerald	7½-8
Spinel	8
Topaz	8
Smokey Topaz	8
Blue Topaz	8
Yellow Topaz	8
Chrysoberyl	8½
Alexandrite	8½
Cat's Eye	8½
Cubic Zirconia	8½
Chromium	8½
Tungsten Carbide	8½-9
Corundum	9
Sapphire	9
Ruby	9
Carborundum	9-9½
Moissanite	9¼
Diamond	10
Fullerite	10+