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.
Amethyst is a variety of quartz that forms fine pyramidal crystals. Its name is of Greek origin. Its hardness is 7 and its specific gravity 2.65. It crystallizes in the orthorhombic crystallographic system and forms crystals in the shape of hexagonal prisms. It is an impressively beautiful material and meets all specifications to be used for crafting jewelry. However, its price is not very high because it is mined in large quantities. Ancient Greeks believed that amethyst could guard against drunkenness.
Tourmaline comprises a large range of sodium minerals and is available in a plethora ofcolors. This mineral is hard and transparent and very resistant to oxidation. Its name is derived from the Sinhalese word “tourmali”, which means “mixed”. It is supposed to strengthen the nervous system. Tourmalines are encountered across all geological formations in America and Indonesia. Green tourmaline has relaxing properties for both body and spirit.
Turquoise is an opaque, bluish-green mineral, a hydrated copper & aluminium phosphate, with a high aluminium content. The natural gemstone is rare and has been prized as an ornamental gemstone for thousands of years because of its unique hue. It is considered to bring peace of mind, relieve stress and promote self-confidence. In Persia, at the time of Alexander the Great, turquoise was used on engagement rings, since according to the tradition, it signified trustworthy relationships.
Tektite (or tektite) is a meteorite, i.e. it has come from space. It is an amorphous silicate glassy rock and in ancient times they were called thunderstones, because people believed that these stones fell to earth with the lightning.