In 1891, examining a meteorite in Canyon Diablo, Arizona, scientists reported finding "hard particles" within it. Later, in ...

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...

“A piece of graphite ore was used as an eyebrow cosmetic and a mixture of cinnabar and animal glue was used as a lipstick or blusher,” it explained. Some of the items, though, may have ...

The material withstands 58 percent more stress than diamonds, and could have "remarkable mechanical properties".

Mixing powdered graphite with clay and forming the mixture into rods that were then fired in a kiln. By varying the ratio of graphite to clay, the hardness of the graphite rod could be modified.