The colors of rubies and emeralds are so striking that they define shades of red and green – ruby red and emerald green. But ...

One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including ...

From emerald green tiles to light sage ... If darker hues aren't your thing then there are plenty of softer green shades that ...

Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...