Jet (Azabache) Jet is a fossil material, coming from Jurassic period trees. Once polished, it acquires a strong black colour, jet black, which remains with the passage of time. In Spain there are deposits in Asturias, in the coast, from Gijon to Villaviciosa. These deposits are considered the best of te world, along with the english deposits in Whitby (Yorkshire), and have been used since prehistoric ages. Since ancient times jet has been considered a magic and protective material. Crude or carved, it has been used as a talisman, due to its high power as a shild against negative energies. One of the most well-known jet icons is the Higa, evil eye amulet, used in Spain since the arabic invasion. Jet is also the material used in most of the popular jewellery in northwestern Spain, and also craved as a memento for the Way of St. James pilgrims.
Its name comes from Latin "Oculus Tigris", because of its similarity to the eye of a tiger. The Tiger's Eye is a yellow and golden brown coloured Quartz variety, with iridescent reflections. It is considered a semiprecious stone. It is known as the Freedom stone. It favours changes. Attracts good luck, and it's used against the Evil Eye. It is an organism cleaner, providing inner strength. It it suitable for introverted people, or for those who need new experiences.
Tourmaline It is usual to find different colourings in the same stone. The dark, black/greenish or azure stones are ferric tourmalines. If the tourmaline is translucent, brown, blue, green or colourless, it's poor in iron. The tourmaline has always been considered a carrier of many virtues. As all the gemstones, it canalises the energy, attracting the positive and neutralizing the negative one. It's very useful for those who are tired, in trouble, or trying to make some changes in their life. It also helps in improving situations of crisis. Physically, it benefits the tranquility, and brings health. Also makes self-regulation easier, so it's useful for meditation.
Olivine (also called peridot) is a magnesium iron silicate. It is olive-green coloured, and it is found in volcanic stones, especially in basalt. In the ancient times there was the belief that it kept the evil spirits away. It is an aura protective stone. It is also known as the loyalty stone. It expresses justice, love and affection towards other people. It relieves jealousy, bitterness and anger. It is suited to relieve stress.
Obsidian. Already used in the Stone Age as ornament, and as a tool; highly regarded due to its cutting ability. Nowadays obsidian scalpels are still used in heart surgery, its edge is very thin, so it causes less damage, allowing surgical wounds to heal quickly. Obsidian is black, although it may change depending on the presence of impurities and the way it is cut. If it is cut in parallel it has a black colour, if cut in perpendicular it is gray. As a result of these colours, we can find different kinds of obsidian: Snowflake obsidian, Mahogany obsidian, Rainbow obsidian. Obsidian is known as the stone of justice, it has properties that favour meditation. It is suited for treatment against depressions, anxiety and nervousness.