Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and ...
Why this extremely rare variant of corundum is frequently found in this ... They found a portion of these millimeter-sized crystals in rock samples collected from volcanic deposits in the numerous ...
Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and ...