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- ...
Diamond is one of the hardest known substances on Earth, and it consists entirely of carbon that has been compressed by extreme pressure and heat. Diamonds are a crystalline form of this element, forming a clear substance with a wide array of uses in the manipulation of light and many industrial applications.