What is the alternative of tungsten!
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Choosing an Alternative Metal Ring
Material Main Feature Mohs Hardness
Tungsten Nice heft, scratch resistant 9, sapphire
Cobalt Looks like white gold or platinum, hypoallergenic 7-8, quartz or topaz
Carbon Fiber Light weight, modern look NA
Ceramic Unique color and finish options 9, sapphire
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Finnish researchers have developed a new hard metal that could replace tungsten in critical industrial, research and military applications. ... The new material, developed in laboratories of the VVT Technical Research Centre of Finland and a Finnish company Exote, thus offers a greener and safer alternative to tungsten.
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