Three assumptions of radiometric dating
The reasonableness of this assumption probably depends on the environment around the sample.
A sample that is sealed from the surrounding environment is more likely to avoid contamination or loss than one in an open environment where materials may be carried into or out of the sample by water or simple diffusion.
Coming in the future – Ice ages, seafloor sediments, dinosaur bones, and more.
In most cases, the three methods produced similar results.
Surprisingly, in at least one case the date range given by There may be other examples of systematic variation in isotope decay rates.
Int Cal09 and Marine09 radiocarbon age calibration curves, 0-50,000 years cal BP.  This was the scroll “Testament of Qahat,” for which the radiocarbon date was about two centuries older than the date based on paleography.
This is the third in a series of articles about a young-Earth creationism (YEC) conference held in Bozeman, Montana in April, 2016. Bozeman creation conference preview and expectations 2. – Yes Genesis does matter, whether a Christian believes in a young Earth or an old Earth. This article – What you haven’t been told about radioisotope dating 4.
In practice, there are sufficient variations in these conditions that it is necessary to correct a sample’s raw radiocarbon age by comparing it with the standard calibration curve.