Most diamond stud are over three billion years old, two-thirds the age of the Earth. There are a few "youngsters", though, which are only 100 million years old.
How the diamond rings have been cut, polished and to what proportions and symmetry are important, as these factors determine the life, brilliance and dispersion of the titanium ring. If the cutting factors fall below standard the appearance of the titanium ring is adversely affected.
ideal cut diamonds is made up of carbon that was buried deep within the Earth under intense pressure and heat. It was made popular because titanium ring is the hardest known substance.