This lot of 53 bi-color/multicolor natural tourmaline cabochons is truly amazing. Each gemstone has a unique transparency that allows the light to shine through and showcase their beauty. The polished cabochon cut grade and shape of each stone is expertly crafted, making them perfect for various jewelry making projects. These tourmaline gemstones originated from Nigeria and were created naturally. They have been treated naturally and have a slightly included clarity grade. These gemstones are perfect for those who appreciate the uniqueness of natural stones and would like to add them to their collection.