TABLE OF HARDNESS AND SPECIFIC GRAVITY.
Meyer D. Rothschild
HARDNESS.
SPECIFIC
GRAVITY.
Achroite
7.
—
7.5?
3.
—
3.1
Alexandrite
8.5
3.65
—
3.8
Almandine
7.5
4.
—
4.2
Almandite
7.5
4.
—
4.2
Amber
2.
—
2.5
1.065
—
1.08
Apatite
4.5
—
5.
2.95
—
3.25
Axinite
6.5
—
7.
3.
—
3.3
Beryl
7.5
—
8.
2.67
—
2.73
Bobrowska garnet
6.
3.85
Bohemian
"
7.5
3.69
—
3.78
Brazilian emerald
7.
—
7.5
3.
—
3.1
"
???sapphire
7.
—
7.5
3.
—
3.1
Cachelong
5.5
—
6.
2.
—
2.1
Cat’s-eye
8.5
3.
—
3.8
Ceylon chrysolite
7.
—
7.5
3.
—
3.1
??"
peridot
7.
—
7.5
3.
—
3.1
Chrysoberyl
8.5
3.65
—
3.8
Chrysolite
6.5
—
7.
3.3
—
3.5
Chrysoprase
7.
2.56
Cinnamon stone
6.5
3.5
—
3.56
Cyanite
5.
—
7.
3.45
—
3.7
Cymophane
8.5
3.65
—
3.8
Demantoide
6.
3.85
Diamond
?10.
3.5
—
3.6
Dichroite
7.
—
7.5
2.56
—
2.67
Diopside
5.
—
6.
2.9
—
3.5
Emerald
7.5
—
8.
2.67
—
2.73
Epidote
6.
—
7.
3.32
—
3.50
Essonite
6.5
3.5
—
3.56
Euclase
7.5
3.1
Fluor spar
4.
3.1
—
3.2
Garnet
5.
—
8.
3.15
—
4.3
Grossularite
6.5
3.5
—
3.56
Hematite
5.6
—
6.5
4.2
—
5.3
Hiddenite
6.5
—
7.
3.13
—
3.19
Hyacinth
7.5
4.4
—
4.7
Hydrophane
5.5
—
6.
2.
—
2.1
Hypersthene
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