Why are the prices so different for the same natural stone? As a beginner, I looked into 'quality'

When looking at natural stones, I sometimes wonder about something.Even though they are stones with the same name, the prices ...
Forbes

Quartz vs. Granite Countertops: Major Differences, Pros And Cons

Having spent 30+ years in residential construction, contracting, remodeling, maintenance and home repair, Deane now contributes DIY, informational and financial content as a freelance writer and ...