Index of Refraction Values

Each material has its own unique index of refraction (n) value. The table below displays n values for various materials.
 
Material Index of Refraction
Vacuum 1.0000
Air 1.0003
Ice 1.309
Water 1.333
Ethyl Alcohol 1.361
Teflon 1.38
Fluorite 1.434
Glycerine 1.473
Benzene 1.501
Plexiglas 1.51
Crown Glass 1.52
Light Flint Glass 1.58
Polycarbonate Glass 1.59
Dense Flint Glass 1.66
Sapphire gemstone 1.77
Zircon 1.923
Diamond 2.417
Rutile 2.907
Gallium phosphide 3.50