Hardness Scale | Conflict Free Stones | Hastings, NE

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Conflict Free Stones

GEM	HARDNESS	ABSOLUTE HARDNESS
Diamond	10	1600
LustouR	9.5	800
Moissanite	9	400
Ruby	9	400
Sapphire	9	400
Cubic Zirconia	8.5	300
Alexandrite	8.5	300
Topaz	8	200
Spinel	8	200
Emerald	8	200
Aquamarine	8	200
Morganite	7.5	150
Tourmaline	7.0 - 7.5	100 - 150
Iolite	7.0 - 7.5	100 - 150
Amethyst	7	100
Smoky Quartz	7	100
Quartz	7	100
Ametrine	7	100
Kunzite	7	100
Citrine	7	100
Aventurine	7	100
Zircon	6.5 - 7.5	86 - 150
Garnet	6.5 - 7.5	86 - 150
Tanzanite	6.5 - 7.0	86 - 100
Peridot	6.5 - 7.0	86 - 100
Agate	6.5 - 7.0	86 - 100
Onyx	6.5 - 7.0	86 - 100
Chalcedony	6.5 - 7.0	86 - 100
Moonstone	6.0 - 6.5	72 - 86
Fire Opal	5.5 - 6.5	60 - 86
Opal	5.5 - 6.5	60 - 86
Pocket Knife	5.5	60
Turquoise	5.0 - 6.0	48 - 72
Tooth	5	48
Glass	4	21
Malachite	3.5 - 4.0	15 - 21
Coral	3.0 - 4.0	9 - 21
Penny	3.5	15
Pearl	2.5 - 4.0	6 - 21
Fingernail	2.2 - 2.5	4 - 6
Amber	2.0 - 2.5	3 - 6
Pencil Lead	1	1

METAL	HARDNESS	ABSOLUTE HARDNESS
Tungsten Carbide	9	400
Vitalium	9	400
Ceramic	9	400
Stainless Steel	7.0 - 8.0	100 - 200
Rhodium	6	72
Titanium	6	72
Paladium	5	48
Zirconium	5	48
Cobalt	5	48
Serinium	5	48
Steel	4.0 - 4.5	21 - 34.5
Platinum	4.0 - 4.5	21 - 34.5
Iron	4	21
10K Gold	4	21
14K Gold	3.0-4.0	9 - 21
Brass	3	9
18K Gold	2.75	7.5
Silver	2.5 - 3.0	6 - 9
24K Gold	2.5	6

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6100 O Street, Suite 274,
Lincoln, NE-68505
(402) 937-7295
office@lovettejewelers.com

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Sun : 12:00 pm - 6:00 pm