Tag Archives: feldspar

A sample of granite from Victoria, Australia, featuring prominent alkali and plagioclase feldspar minerals (in pinkish-red and gray colors, respectively), along with quartz (shiny) and black mica.
1747: Feldspar – The Backbone of Continental Crust

Feldspar, constituting a major part of the Earth's continental crust, is a framework silicate mineral rich in silicon, oxygen, and elements like calcium, potassium, and sodium. First named by Johan Gottschalk Wallerius in 1747, feldspar's [...]