Tiger eye beads Color: Yellow, Dark Yellow and Brown (even Golden Orange), with silky reflections, shimmering Sizes between 4 and 14mm Country of origin: South Africa Tiger's Eye Gemological Information: Possible colors: Yellow, Dark Yellow and Brown (even Golden Orange), with silky reflections, shimmering Density: Between 2.58 and 2.66 Hardness: 7 Crystal system: Trigonal Breakage: Irregular Cleavage: None Polariscope: Anisotropic (but opaque, does not restore) Refractive index: 1.53 to 1.55 Birefringence: 0.004 to 0.0010 (difficult to read) Chelsea filter: Inert Spectrum: Not observable/not diagnostic Different countries where tiger's eye can be extracted: South Africa, Australia, Mexico, Sri Lanka, Austria. Treatments that exist to modify tiger's eye: - Thermal (tiger's eye is heated to become bull's eye) - Coloring (tiger's eye is colored for