Diamond is one of a crystalline allotrope of carbon having a cubic crystal lattice with a rigid network of carbon atoms, strongly held together by covalent bonds.
It is the hardest naturally occurring substance known to have high thermal conductivity, thus used as a cutting tool or polishing tool for various industrial purposes.
Due to their lustrous property and extended durability, diamonds are widely used in making jewelry such as earrings, pendants, etc.
In the medicinal area, diamonds play an important role as they are used in surgical tools. These tools are utilized in by eye surgeons in the treatment of eyes specifically to remove cataracts from the eyes.
Diamond is also used in high-precision thermometers.