Substance

Index of Refraction

Acetone

1.36

Agate

1.544

Air

1.0002926

Alcohol

1.329

Aluminum

1.44

Amber

1.546

Amethyst

1.544

Aquamarine

1.577

Asphalt

1.635

Benzene

1.501

Bromine (liquid)

1.661

Bronze

1.18

Calcite

1.486

Carbon dioxide (gas)

1.000449

Chalk

1.510

Chlorine (gas)

1.000768

Chlorine (liquid)

1.385

Cobalt blue

1.74

Cobalt green

1.97

Cobalt violet

1.71

Copper

1.10

Copper oxide

2.705

Coral

1.486

Crystal

2.00

Diamond

2.417

Dolomite

1.503

Emerald

1.576

Ethanol

1.36

Ethyl alcohol

1.36

Fluoride

1.56

Formica

1.47

Glass

1.51714

Glycerine

1.473

Gold

0.47

Helium

1.000036

Hydrogen (gas)

1.000140

Hydrogen (liquid)

1.0974

Hypersthene

1.670

Ice

1.309

Iodine crystal

3.34

Iron

1.51

Ivory

1.540

Jade

1.610

Lapis lazuli

1.61

Lead

2.01

Mercury

1.62

Methanol

1.329

Nitrogen (gas)

1.000297

Nitrogen (liquid)

1.2053

Nylon

1.53

Onyx

1.486

Opal

1.450

Oxygen (gas)

1.000276

Oxygen (liquid)

1.221

Pearl

1.530

Plastic

1.460

Plexiglas

1.50

Polystyrene

1.55

Quartz

1.544

Rock salt

1.544

Rubber

1.5191

Ruby

1.760

Sapphire

1.760

Silicon

4.24

Silver

0.18

Sodium chloride

1.544

Steel

2.50

Styrofoam

1.595

Sulphur

1.960

Teflon

1.35

Tiger eye

1.544

Topaz

1.620

Turpentine

1.472

Turquoise

1.610

Water (gas)

1.000261

Water (100ºC)

1.31819