Multicolor moonstone beads Color: multicolor Sizes between 6 and 8 mm. Country of origin: India Moonstone gemological information: Note: the name moonstone is a trade name. Officially part of the feldspar group. This is the name that is generally given to orthosis. But some feldspars can also inherit this name when they show adularescence. Possible colors: color in the mass, generally colorless to white, gray, orange, brown, green. Namely: feldspar family. Density: between 2.56 and 2.59. Hardness: 6. Crystal system: triclinic. Break: irregular, conchoidal. Cleavage: perfect. Polariscope: Anisotropic. Generally opaque, does not restore because it is unobservable. Refractive index: Np: 1.518 to 1.529. Nm: 1.522 to 1.533. Ng: 1.522 to 1.539 Birefringence: 0.007 to 0.009. Chelsea filter: generally no modification. Spectrum: indistinct.