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.
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.
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, 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.
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.
Blue is the hardest color to see as more light energy is required for a full response from blue-violet cones, compared to green or red. At a certain light level, a blue-violet color appears darker than green or red, notes the UCLA Department of Atmospheric and Oceanic S...
"Hardest Game Ever 2" is a mobile game for iOS and Android that features a series of puzzle mini-games. These mini-games test the reaction time of players and grade them based on their speed and accuracy. It's a free-to-play mobile game, although optional in-app purchas...