SPINEL

Characteristics

Hardness (or Mohs Hardness) : 8

RI (Refractive Index) : 1,718 à 1,730

SG (Specific Gravity) : 3,61 to 3,67

Nomenclature SPINEL

Dimensions in mm Carat
2,0 0,03
2,5 0,07
3,0 0,12
3,5 0,22
4,0 0,31
4,5 0,40
5,0 0,56
5,5 0,77
6,0 0,98
7,0 1,40

Nomenclature SPINEL

Dimensions in mm Carat
4x3 0,20
5x3 0,28
6x4 0,53
7x5 0,82
8x6 1,33
9x7 2,01
10x8 2,66
11x9 4,03
12x10 5,22
14x10 6,52

Nomenclature SPINEL

Dimensions in mm Carat
4x2 0,10
5x2,5 0,15
6x3 0,28
8x4 0,63
10x5 1,12
12x6 1,99
15x7 4,40
16x8 5,24
18x9 7,84
20x10 10,64

Nomenclature SPINEL

Dimensions in mm Carat
3,0 0,17
4,0 0,39
4,5 0,50
5,0 0,61
5,5 0,86
6,0 1,17
7,0 1,48
8,0 1,89
9,0 2,59
10,0 3,97

Nomenclature SPINEL

Dimensions in mm Carat
4x3 0,24
5x3 0,31
6x4 0,63
7x5 1,17
8x6 1,76
9x7 2,46
10x8 4,02
11x9 5,21
12x10 7,33
14x10 7,70

Nomenclature SPINEL

Dimensions in mm Carat
5x3 0,24
6x4 0,43
7x5 0,77
8x5 1,17
9x6 1,87
10x7 2,53
12x8 3,50
14x9 5,72
15x10 6,10
16x12 10,22

Nomenclature SPINEL

Dimensions in mm Carat
2,0 0,07
2,5 0,11
3,0 0,18
3,5 0,35
4,0 0,42
4,5 0,70
5,0 0,82
5,5 1,00
6,0 1,26
7,0 2,04

Sources

Spinel's major deposits are in Sri Lanka, Myanmar, Tanzanie and Pakistan.

Common treatments

Spinels are rarely treated.

Care and Cleaning

Spinel has an excellent durability.
However, ultrasound and steam jets should be used very carefully.

Clean with warm soapy water and dry with a soft cloth.