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- ...
Top 10 Hardest Mineral in the World 10. Talc -Talc is a mineral composed of hydrate magnesium silicate and widely known as talcum powder. According to the Mohs hardness scale it is the softest mineral and easily scratched by nail and can be cut by knife.