Prehnite stone belongs to the silicates family and is quite rare. A highly appreciated ornamental stone, it is found in various forms: rough, rolled, flattened pearl, cabochon cut, faceted cut, etc., depending on what it is meant for (necklaces, bracelets, rings, earrings, small objects…). It is named after a Dutch commander, Hendrick Von Prehn, who supposedly discovered it in 1774, at the Cape of Good Hope. He brought back several of these minerals and had them analyzed by Abraham Gottlob Werner, a German mineralogist. The latter recognized the stone as a new mineral species. In 1783, Werner gave it the name “prehnite” in honour of the man he thought had discovered it.
However, it was found that the first samples of this stone had already been reported in 1771 by a French astronomer, Alexis-Marie de Rochon, during a trip to the Southern Lands. Its earliest description was therefore made by Balthazar Georges Sage. This French mineralogist named it, the same year, « Chrysolite of the Cape ». But this name is now forbidden. At the time, this gem was very rare and was already known for certain virtues. For the shamans of South Africa, prehnite stone allowed them to make good decisions, and thus helped them guide their community. The Aborigines of Australia believed that the stone had the power to absorb and store the sun’s energy and then release it again. They used it at night to keep warm and to repel nocturnal creatures.
Prehnite stone is the first stone named after a person, in this case Hendrick Von Prehn. This gem, containing epidote inclusions (dark or white lines), is composed of calcium-aluminum silicate, and sometimes iron. Mainly green to yellow, translucent or semi-transparent, it can also take on grey or milky white tones. It looks a lot like jade. It is sometimes called « Australian yellow jade », or « grape jade » in China. An even rarer variation, orange-coloured, has been discovered in Canada and South Africa. Because of its colour, quality and rarity, this splendid natural stone seduces jewellers and collectors.
This mineral usually forms in cavities and cracks in eruptive rocks and crystalline schists. Deposits can be found in several countries around the world: mainly South Africa and India, but also the United States, Australia, Mali, France (Isère), Italy, Spain, Germany, Switzerland. Mali prehnite is one of the most beautiful specimens, thanks to the inclusions of epidote it contains. In addition, its refractive index is from 1.61 to 1.67. Comparatively, the refractive index of diamond is 2.42. Generally, the higher the index, the slower and more deflected the light is, and therefore the brighter the stone. Moreover, this stone is biaxial, which means that it has two optical axes. The transmitted light is divided into three vibrating directions. However, it may appear uniaxial (only one optical axis).
This stone prevents its wearer from being affected by external evils and bad energies. Whether it is on a physical or emotional level, it is therefore useful for therapists, since it protects them from the projections of patients. On the other hand, this mineral acts slowly. It is therefore advisable to wear it with skin contact. To recharge it and preserve its energy quality, it is preferable to expose it to the new moon’s light.
Prehnite stone is considered a “therapeutic” stone and provides powerful protection to its wearer. Beneficial for the soul, it calms the mind, especially in tense situations. It helps to fight against fears and anxieties, and keeps away bad dreams. Its soothing effect will thus benefit people suffering from chronic sadness and emotional blockages. It brings an optimistic state of mind and encourages people to live in the moment. Thanks to the sense of fullness and serenity it provides, its wearers will more easily face their problems. They will also be rid of the nostalgia accumulated over time. Thus, small issues will no longer turn into absolute barriers.
It also helps to clarify confused ideas, to put some order in one’s projects, which can be useful to people who lack perseverance and courage. By structuring thoughts, it helps to achieve one’s goals. Finally, it promotes self-awareness and self-acceptance. Green prehnite further increases perception.
By stimulating the metabolism, prehnite stone prevents fat storage. It can then be used as part of a slimming programme to boost weight loss. It balances the lymphatic and cardiovascular system. Thanks to its cleansing and purifying properties, it relieves kidney and bladder disorders. It can therefore calm urinary tract infections and relieve gout attacks.
In addition, it promotes bones strengthening and reconstruction. It is therefore particularly suitable for growing children and elderly people or people who have suffered a fracture and whose bones are weakened. This natural stone can reduce restlessness and nervousness, which is useful in cases of hyperactivity, especially in children. In addition, it has a regulating effect on hair, may protect against ageing, acts on the sexual organs and is beneficial in the case of acne treatments.