Corundum Stone from Asia . 
4 45 
Table of the specific Gravity of the Corundum, Sapphire, 
Topaz, Ruby, and Diamond, on different Authorities. 
Corundum. 
Hatchett and Greville 
2,768 
* Matrix of Corundum. Coast. 
H. and G. 
2,785 
*Lump of Corundum. Coast. 
JClaproth 
75 
Klaproth 
3’7 10 
Blumenbach 
3,808 
Brisson 
3, 8 73 
Hatchett and Greville 
3,876 
* Corone. Bengal. 
Lichtenberg 
3,9°8 
Gross 
3,935 
Hatchett and Greville 
3,95o 
* Crystal of Corundum. Coast. 
H. and G. 
3,954 
* Ditto with vitreous cross 
fracture. Coast. 
U and G. 
3,959 
* Ruby -coloured. Coast. 
H. and G. 
3,959 
* Chatoyant. China. 
H. and G. 
3 , 9^2 
* Crystal. China. 
Klaproth 
4,180 
Sapphire . 
Brisson 
3, *3° 
Brasilian; probably a topaz. 
Bergman 
3,650 f 
Quist 
3,8oof 
Bergman 
3,940 + 
Klaproth 
3,95o+ 
Bergman 
3,974+ 
