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- ...
A diamond is the hardest naturally occurring material on Earth and is much rarer than gold. About 175,000 tons of gold have been mined in all of human history, while only around 500 tons of diamonds have been mined in the same amount of time.