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

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

While crystals and gemstones are often admired for ... it can break down and release harmful particles. This mesmerizing green mineral is a uranium ore, which makes it highly radioactive.

Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.

Optical crystals with a strong nonlinear response ... YAG laser from its native wavelength in the near infrared (1,064 nm) to the green (532 nm) and the UV (355 nm). Another nonlinear material ...