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

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

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

Meaning and Properties," a comprehensive guide exploring the natural energies and spiritual benefits of green crystals. The ...