Web Results

www.reference.com/article/hardest-material-earth-47d3cef59b8c369d

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.

www.reference.com/article/hardest-metal-earth-ab13c4e3e9814f4a

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.

www.reference.com/article/hardest-rock-earth-402c36f284c19e4c

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.

www.reference.com/article/hardest-metal-9060987517dc7966

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.

www.reference.com/article/hardest-metal-world-db45f22c120b53ad

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.

www.reference.com/article/hardest-color-see-d53b847eb1eeff5e

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...

www.reference.com/article/hardest-game-ever-2-c949c3da4694e033

"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...