As for 2014, the hardest material on earth is a diamond, a form of pure carbon. It ranks 10 on the Mohs hardness scale and has a rating of between 70 and 150 GPa, or gigapascals on the Vickers hardness scale.
Anatomically modern humans, Homo sapiens sapiens, are a 150,000-year-old subspecies responsible for the entirety of recorded history and civilization. The human species, Homo sapiens, is currently believed to date back nearly 200,000 years.
The hardest known substance is lonsdaleite, also called hexagonal diamond, according to a study published in Physical Review Letters and reported on Phys.org. Lonsdaleite is 58 percent stronger than diamond, which was previously considered to be the hardest substance.
Alloyed steels, steel combined with other elements to increase their hardness and strength, are the hardest known metals. Maraging steel, a heat-treated steel, is one of the strongest steel alloys.
There's no single hardest rock on Earth. The strongest types, on the other hand, include quartz in their makeup: quartzite, quartz sandstones, rhyolites and granites, according to the MadSci Network.
Maraging steel is the hardest metal on Earth. This steel is an alloy of nickel, cobalt and molybdenum. Most of the hardest metals are not naturally occurring; instead, they are man-made alloys.
Maraging steel, which is a super-strong steel, is the hardest-known metal in the world. It is an iron alloy that contains high amounts of cobalt, nickel and molybdenum.