My family does airborne mineral exploration, and it's the same for thorium (we look for three types of radiation to determine whether a certain spot is likely t

My family does airborne mineral exploration, and it's the same for thorium (we look for three types of radiation to determine whether a certain spot is likely to be uranium: uranium, potassium, and thorium) the benefit is that you can directly tell that it's uranium due to it giving off specific wavelengths, vs with diamonds, you need significant interpretation of the data to look for not-diamonds and hope that there are diamonds there too