This simply becomes one of the most expensive rings in the world due to the two large diamonds it covers.
Formed in 1972 from the Bulgari collection, an Asian collector willingly accepted the ring for $15.7 million after an intense bidding war.
Diamond is a solid form of carbon with a diamond cubic gemstone structure.
At room temperature and pressure, it is graphite and metastable is the stable form, but diamond almost never converts to graphite.
Diamond is famous for its superlative physical qualities, most of which create from the strong covalent bonding between its atoms.
In specific, it has the uppermost hardness and thermal conductivity of any bulk material.