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 ...

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

Ever considered decorating with emerald green? The rich shade is the most luxurious, the most bold, but also perhaps the most difficult shade of green to use. But it doesn't have to be. It's true ...

Two distinct yellow lateral strips mark their thorax and fade into white as the dragonflies age. A brilliant, emerald-green color covers their enormous eyes, which possess almost 360-degree peripheral ...