Not being made of carbon, we can’t carbon date them.
Since carbon-14 has a half-life on the order of thousands of years, it’s useful for figuring out the age of organic materials that have been independent of the atmosphere for thousands of years. That’s not great: once everything on Earth is peppered with lead, it’s difficult for scientists to do their science.There are many different kinds of radiometric dating that are used to date things that are non-organic (which is part of how we determine the age of the Earth).They each rely on a couple of different (thoroughly verified) principles.As water freezes and each molecule falls into place, atoms that don’t fit in the forming ice crystal are excluded. For example, zircon (a crystal) is perfectly happy to incorporate uranium, but excludes lead.Impurities, such as dissolved air, are either forced out or concentrated in the last region to freeze. It so happens that uranium decays into lead with a half-life of 4.5 billion years.