Some gemstones are crystals, such as amethyst, which is a variety of the mineral quartz and is often cut into gemstone form. Not all crystals get the gemstone treatment, however (just look at poor old ...
Crystals are more than pretty objects to admire. They are used in a noninvasive, energy-based healing mode to realign our body’s energy. Some 6,000 years ago, the Sumerians of Mesopotamia believed in ...
Bayer. Akad. der Wiss., 1912, p. 303) some remarkable effects obtained by passing a fine stream of X-rays through a crystal before incidence upon a photographic plate. A curious arrangement of ...