Rare gem clear pleochroic vivianite crystals sourced directly from Brazil. Intriguing aspect of Vivianite is its connection to ancient ecosystems. Vivianite crystals are frequently found in sedimentary environments that were once rich in organic matter, such as ancient lake beds or bogs. These crystals can form over long periods as a result of the interaction between minerals, organic materials, and water. Specimen on acrylic base.