INDICE RIFRAZIONE GEMME

Gemstone

Refractive Index

1

Actinolite

1.614

-

1.642

2

Albite Feldspar

1.525

-

1.536

3

Almandite Garnet

1.790

-

1.790

4

Amber

1.540

-

1.540

5

Andalusite

1.634

-

1.643

6

Andrdite Garnet (Demantoid)

1.875

-

1.875

7

Apatite

1.642

-

1.646

8

Benitoite

1.757

-

1.804

9

Beryl

1.577

-

1.583

10

Brazillanite

1.602

-

1.621

11

Calcite

1.486

-

1.658

12

Chalcedony

1.535

-

1.539

13

Chrysobery (Alexandrite)

1.746

-

1.755

14

Coral

1.486

-

1.658

15

Corundum (Sapphire only)

1.762

-

1.770

16

Cubic Zirconium Oxide

2.177

-

2.177

17

Danburite

1.630

-

1.636

18

Diamond

2.417

-

2.417

19

Diopside

1.675

-

1.701

20

Dioptase

1.655

-

1.708

21

Emerald

1.580

-

1.580

22

Fluorite

1.434

-

1.434

23

G.G.G

2.030

-

2.030

24

Glass

1.440

-

1.900

25

Hematite

2.940

-

3.220

26

Idocrase

1.713

-

1.718

27

Iolite (Cordierite)

1.542

-

1.551

28

Ivory

1.540

-

1.540

29

Jadeite

1.660

-

1.680

30

Jet

1.660

-

1.660

31

Kornerupine

1.667

-

1.680

32

Kyanite

1.716

-

1.731

33

Labradorite Feldspar

1.559

-

1.568

34

Lapis-Lazull (Lazurite)

1.500

-

1.500

35

Malachite

1.660

-

1.910

36

Microcline Feldspar

1.522

-

1.530

37

Moldavite

1.500

-

1.500

38

Nephrite

1.606

-

1.632

39

Obsidian

1.500

-

1.500

Gemstone

Refractive Index

40

Oligoclase Feldspar

1.539

-

1.547

41

Opal

1.450

-

1.450

42

Orthoclase Feldspar (Moonstone)

1.518

-

1.526

43

Peridot

1.654

-

1.690

44

Plastic

1.460

-

1.700

45

Pyrope Garnet

1.746

-

1.746

46

Quartz

1.544

-

1.553

47

Rhodochrosite

1.597

-

1.817

48

Rhodolite Garnet

1.760

-

1.760

49

Rhodonite

1.730

-

1.740

50

Sapphire

1.670

-

1.770

51

Scapolite

1.550

-

1.572

52

Serpentine

1.560

-

1.570

53

Shell

1.530

-

1.686

54

Sinhalite

1.668

-

1.707

55

Sodalite

1.483

-

1.483

56

Spessartite Garnet

1.810

-

1.810

57

Sphene

1.900

-

2.034

58

Spinel

1.718

-

1.718

59

Spodumene (Kunzite)

1.660

-

1.676

60

Strontium Titanate

2.409

-

2.409

61

Synthetic Corundum

1.762

-

1.770

62

Synthetic Emerald (Flux)

1.561

-

1.564

63

Synthetic Emerald (Hydro)

1.568

-

1.573

64

Synthetic Moissanite

2.650

-

2.650

65

Synthetic Rutile

2.616

-

2.903

66

Synthetic Spinel

1.730

-

1.730

67

TL Grossularite Garnet

1.720

-

1.720

68

Topaz (Blue, White)

1.619

-

1.627

69

Tourmaline

1.624

-

1.644

70

TP Grossularite Garnet (Hessonite)

1.740

-

1.740

71

Turquoise

1.610

-

1.650

72

Verdite

1.580

-

1.580

73

Y.A.G.

1.833

-

1.833

74

Zircon (High)

1.925

-

1.984

75

Zircon (Low)

1.810

-

1.815

76

Zircon (Medium)

1.875

-

1.905

77

Zoisite (Tanzanite)

1.691

-

1.704