PREHN-R-01 Origin: South Africa Grade: A+ Dimensions: 05-10g - Approximately 15-25mm 10-20g - Approximately 25-35mm Origin: South Africa Grade: A+ = high Tumbled prehnite stone from South Africa Sold individually Weight of 05-10g and 10-20g Shapes and colors may vary from one stone to another. Prehnite is generally green in color, but can sometimes have shades ranging from yellow to brown, or even white. It is mostly found in pale green to darker green colors. It can appear solid or with black inclusions. Its inclusions are mainly epidote or actinolite inclusions. Their presence is noticeable due to the numerous small black streaks present in the stone. Prehnite is a mineral stone composed of calcium and aluminum sorosilicate. It belongs to the silicate group, sub-group of phyllosilicates. The chemical composition of prehnite may also include other elements such as titanium, iron, manganese, sodium, or potassium. Prehnite has a hardness of 6 to 6.5 on the Mohs scale. In comparison, diamond has the highest hardness, which is 10 on the same scale. Prehnite is mentioned by Theophrastus, a philosopher of Ancient Greece, in the 3rd century BC, who refers to it in his work On Stones and attributes it the name of green grape. However, no legend or myth is attached to this stone. It is said that for South African shamans, prehnite guides them in making good decisions and thus helps to better guide their community. Australian shamans attribute to this stone the ability to absorb sunlight and release it at night. It is also used to warm and ward off night creatures. In 1771, this stone was named "Cape chrysolite" by the French mineralogist Balthazar Georges Sage. This name refers to its place of discovery, the Cape of Good Hope in South Africa. Indeed, it turns out that the first specimens were brought back by the French astronomer Alexis-Marie de Rochon during an expedition to South Africa. But in 1774, the Dutch general Hendrik von Prehn brought back mysterious green stones from the Cape of Good Hope. He passed them on to Abraham Gottlob Werner, a famous German mineralogist, for analysis. He identified this stone as a new mineral species. He was unaware of Balthazar Georges Sage's discovery. In 1783, this fascinating green mineral received the definitive name of prehnite in honor of General von Prehn. Today, prehnite comes in various forms, often intended for jewelry or jewelry making. It is also commonly used in lithotherapy due to its many virtues.