geology.com

vPZxj TIL Ruby and Sapphire are the same mineral, Corundum, a type of Aluminum Oxide. The only difference are contaminants that give the stone its color.
W7pg8 TIL that the Hoba meteorite is the largest in the world which estimates to 60 tons is discovered in Namibia
LQ1Wm TIL Volcanos in Hawaii can produce hair-like strands of glass called "Pele's Hair."