The Carbon 14 (C-14) dating method is a radiometric dating method. A radiometric dating uses the known rate of decay of radioactive isotopes to date an object. Each radioactive isotope has a known, fixed rate of decay, which we call a half-life.

Are old cut diamonds more valuable?

As with other diamond shapes, the value and price of an old mine cut diamond can vary based on its carat weight, color, clarity and the quality and beauty of the diamonds cut. Old mine cut diamonds are generally 10 to 15 percent less expensive than the old European cuts.