Spessartine garnet

Spessartine garnet

Hardness
7.25
Refractive index
1.79 to 1.82
Specific gravity
4.1 to 4.2

Nomenclature

Shape

Indicative weight

– carats

Dimensions (mm)Weight (ct)

A calibrated series, to scale

All shapes side by side
Round
Dimensions (mm)Weight (ct)
2.00.05
2.50.09
3.00.14
3.50.24
4.00.35
4.50.47
5.00.64
5.50.87
6.01.12
7.01.60
Oval
Dimensions (mm)Weight (ct)
4 × 30.24
5 × 30.31
6 × 40.61
7 × 50.94
8 × 61.52
9 × 72.30
10 × 83.04
11 × 94.61
12 × 105.97
14 × 107.45
Marquise
Dimensions (mm)Weight (ct)
4 × 20.12
5 × 2.50.17
6 × 30.32
8 × 40.72
10 × 51.28
12 × 62.27
15 × 74.40
16 × 85.24
18 × 97.84
20 × 1012.16
Heart
Dimensions (mm)Weight (ct)
3.00.19
4.00.45
4.50.50
5.00.61
5.50.86
6.01.34
7.01.69
8.02.16
9.02.96
10.04.54
Octagon
Dimensions (mm)Weight (ct)
4 × 30.28
5 × 30.37
6 × 40.72
7 × 51.34
8 × 62.01
9 × 72.81
10 × 84.59
11 × 95.95
12 × 108.38
14 × 108.80
Pear
Dimensions (mm)Weight (ct)
5 × 30.26
6 × 40.49
7 × 50.88
8 × 51.17
9 × 61.87
10 × 72.53
12 × 84.00
14 × 95.72
15 × 106.97
16 × 1211.68
Square
Dimensions (mm)Weight (ct)
2.00.08
2.50.13
3.00.22
3.50.40
4.00.48
4.50.70
5.00.89
5.51.00
6.01.44
6.02.33

Sources

Brazil, Madagascar, Sri Lanka, Myanmar (Burma), Namibia, United States, and Australia.

Common treatments

Spessartines usually have a very bright colour that makes them look like tiny tangerines.

They also have a very pleasant lustre.

They are rarely treated.

Care and cleaning

Garnet's medium hardness makes this stone quite easy to scratch.

Keep the spessartine away from heat, thermal shocks, ultrasound and blowtorch as it might cause cracks.

Handle with care and store separately to avoid any risk of abrasion.

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