Rare Cat's Eye Blue-Green Tourmaline (Christ Stone)

Cat's eye tourmaline is considered relatively rare due to the specific conditions required to create the chatoyancy (cat's eye effect), which results from fine, parallel inclusions within the stone. While tourmaline itself is a fairly common gemstone found in various colors, only a small percentage exhibit the cat's eye effect, making it a sought-after variety. The rarity increases with the quality of the stone, such as its color intensity and clarity, as seen in this blue-green specimen. High-quality cat's eye tourmalines, especially in unique hues like blue-green, are less commonly available compared to standard tourmaline cuts.