There are two reasons uncalibrated dates must be mentioned: 1) this prevents people from making up any number they please, and 2) it is for the sake of posterity, where future scientists can check the results and apply new ideas of calibration. Radiocarbon dates are affected by many outside factors.
This does not mean that recalibration is bad, indeed it is necessary, but it should make one more soberly assess any reported dates as being tentative.
The problem is that most people reporting on these issues fail to report the initial number along with the calibrated date. The Jericho controversy is soundly rooted in C-14 calibration.
Diamond is the hardest substance known, so its interior should be very resistant to contamination.
Diamond requires very high pressure to form—pressure found naturally on earth only deep below the surface.
C at all if they really were over a billion years old, yet the radiocarbon lab reported that there was over 10 times the detection limit.
Thus they had a radiocarbon ‘age’ far less than a million years!The energies involved are so large, and the nucleus is so small that physical conditions in the Earth (i.e. The rate of decay or rate of change of the number N of particles is proportional to the number present at any time, i.e.The half-life is the amount of time it takes for one half of the initial amount of the parent, radioactive isotope, to decay to the daughter isotope.Graphite, one of the softest materials known, is a form of carbon that is primarily used as a lubricant.Although it does occur naturally, most commercial graphite is produced by treating petroleum coke, a black tar residue remaining after the refinement of crude oil, in an oxygen-free oven.Naturally occurring graphite occurs in two forms, alpha and beta.