There are two factors that move prices up from cheap to the more expensive end of the spectrum; they are scarcity and where you live. If a particular slab is hard to get it will be more expensive, so just because it’s priced high that doesn’t mean that its’ better quality. Where you live also matters because material and especially labor prices can vary dramatically with the cost of living.
When selecting your countertop it is important to choose a material that will meet the functional needs of your space as well as the desired aesthetic. You may be selecting countertops for your family kitchen, a rental property or for a home you plan to resell so be sure to consider who will be using the space.