The moonstone is characterised by an enchanting play of light. Indeed it owes its name to that mysterious shimmer which always looks different when the stone is moved and is known in the trade as 'adularescence'. In earlier times, people believed they could recognise in it the crescent and waning phases of the moon.
| Color | Can be numerous colors, including Blue, Grey, White, Pink, Peach, Green and Brown |
| Mohs scale hardness | 6.0 - 6.5 |
| Specific gravity | 2.55 - 2.76 |
| Refractive index | 1.518 - 1.526 |