There’s some finesse required to keep the nascent rubies from scattering all over the place, but in the end, [NightHawkInLight] was rewarded with a large, deep pink ruby. This looks like a fun ...

rubies, sapphires, and emeralds continue to qualify as "precious." (At one time, amethyst was also considered a precious gem, but large reserves were later found in Brazil, reducing its value.) ...

The colors of rubies and emeralds are so striking that they define shades of red and green — ruby red and emerald green. But have you ever wondered how they get those colors? One feature of ...