Has Carbon-14 Been Found In Diamonds

It amounts to almost nothing. Since the half-life of 14C is around 5,500 years, the majority of diamonds are incredibly ancient. Therefore, if the diamond is older than 55,000 years, which is considered to be on the younger end of the spectrum for diamonds, then it will only have 1/2 x 10 or 0.098 percent of the initial amount of 14C.