In the Hindu religious tradition, the tulsi, or holy basil, plant serves both as an important symbol and also as a popular medicinal remedy.
Diamond use to be the hardest known natural substance now it is the mineral lonsdaleite at 58% stronger then diamond is the first the second hardest is wurtzite boron nitridâ¦e at 18% stronger then diamonds they are both extreamly rare natural minerals sources http://www.newscientist.com/article/dn16610-diamond-no-longer-natures- ...
Since the late 1800âs when a French chemist, Henri Moissan, first synthesized it, tungsten carbide. has been known as one of the hardest substances in existence, approaching diamond in this. respect. In fact, he was seeking to produce man-made diamonds, but WC was the result.