https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crust
silicon – 28.2% of earth's crust; 7,200,000 tonnes extracted per year
bismuth – 0.00000085% of earth's crust; 10,200 tonnes extracted per year
https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crust
silicon – 28.2% of earth's crust; 7,200,000 tonnes extracted per year
bismuth – 0.00000085% of earth's crust; 10,200 tonnes extracted per year