If you tend to mouth breathe at night, it is important to make a check for the dryness every morning. While night sleeping, it is very important to breathe through your nose. In case you neglect your mouth breathing for 7-8 hours every night, it will be difficult for you to change your breathing on a permanent basis.
Diamond is currently thought to be the hardest natural material on Earth, having a hardness of ten out of ten on the Mohs scale of mineral hardness. Diamond is made up of carbon atoms which share strong covalent bonds (where electrons are shared between atoms) and are equally spaced in a lattice arrangement.
Diamond is the hardest material on the earth. It can cut everything but it can't be cut by any other except Diamond. It is used to drill the mountains. You may have several times seen a knife by which shopkeeper used to cut the glass. There is a small amount of Diamond at the tip of knife. It is the allotrope of Carbon atom. In India it is called Bajra which means : the hardest material. This is the stone which attracts women most.