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- ...
Hardest Substance in the Human BodyNo, the hardest substance in the human body is you tooth enamel. it the the outermost part of the teeth and next to it is the dentin which is softer than enamel but harder than bone. 9 people found this useful.