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- ...
Hardness Hardness is a relative term when talking about materials, both metal and non-metal. Diamonds are commonly known as the hardest substance on earth, used in drill bits for cutting applications. Of the natural elements titanium is considered to be extremely hard, if not the hardest. Alloys, a combination of elements, can make the hardnessâ¦