What rock type is best for obtaining the absolute age using radiometric dating?

The rock type that is best for obtaining the absolute age using radiometric dating would be igneous rocks. These rocks are best suited for the radiometric dating method in determining the absolute age since these are made from cooled molten rock or magma. As a magma cools down, radioactive isotopes are being separated from the rock which would make it easier to detect. The rocks would contain only the parent isotope and no traces of the daughter isotope. Radiometric dating is used to determine age if certain rocks basing from the decay rate of the radioactive isotopes present in the rock.