- Color: light green or yellowish green
- Hardness: 6.5 - 7
- Refractive index: 1.66 - 1.68
- Density: 3.15 - 3.21
- Chemical composition: LiAl(SiO3)2
- Crystal structure: monoclinic
- Origins: USA, Afghanistan, Pakistan, Brazil, Madagascar
Hiddenite is a rare light green variety of Spodumene. The stone has a noticeable pleochroism effect (from bluish green to yellowish green). Intense green or bluish green specimens are very rare and the most valuable.