Kyanite or Disthene is a translucent pale to sapphire blue mineral. The name Kyanite is derived from the Greek word “kyanos” which means deep blue, while the name Disthene is derived from its anisotropism, i.e. its property of exhibiting variable hardness depending on its orientation. Its hardness varies from 4.5 to 7 in the Mohs scale, depending on the direction it is processed.
Aquamarine is a pale blue to greenish blue Beryl variety, a favorite among jewelers.
Tiger’s eye is one of the most popular quartz varieties. It has a brown color with golden-yellow veins and displays an excellent luster. These veins retain the fibrous structure of crocidolite. It exhibits a characteristic linear iridescence like a moving reflection. This very characteristic optical effect is known by the French word chatoyancy, which means “cat’s eye” and symbolizes the union of the Earth with the Sun. Tiger’s eye is considered to promote decision-making and self-confidence. It is encountered in the USA, South Africa, Namibia, and Brazil.