What is the staggering mass equivalent of a single teaspoon of Neutronium material?

The mass equivalent to billions of tons of terrestrial rock

The density achieved within a neutron star is so extreme that visualizing it requires abandoning normal terrestrial scale comparisons. The material, often termed neutronium, represents matter compressed to an almost unimaginable degree. To grasp this density, one single teaspoon taken from this object would contain a mass comparable to billions of tons of ordinary terrestrial rock. This enormous mass packed into such an infinitesimal volume highlights the intense gravitational forces that have compressed the original stellar core, which might have been comparable in mass to our Sun, down to a size akin to a major metropolitan area.