[ 4 « ] 
Its natural Appearance. This furprizing Stone is 
not yet known to be produced in any Country but 
China. 
We now proceed to make a few Remarks or 
Obfervations on the Nature of the tranfparenc 
Gems: Thefe are not improbably fuppofed to take 
their feveral Tinges or Colours from the predomi¬ 
nant Influence of fome neighbouring Mine, com¬ 
municated in the fame Manner, that beautiful blue 
is to the Turcois in a Copper Mine. Thefe Gems 
are by the Naturalifts, according to their Qualities 
and Hardnefs, difpoled in the following Order. 
Aqua Marina , Aque Marine. This is, in all 
Probability, the Beryl of the Ancients; it took its 
modern Name from its Colour, which is a fine Sea 
green inclined to biuifh, refembling Sea Water j 
which it receives from the Influence of Copper and 
Iron Ore. When this Stone is in Perfection, it 
approaches to the Hardnefs of a Grenate or Garnet, 
but is often much fofter: a very fmall Degree of 
Heat deprives it of its Colour. It is found in the 
Eaji Indies , particularly in the Ifland of Ceylon , and 
fometimes in Europe., as in Silefia , &c. Thofe froni 
the warmer Eaftern Climates are much the.hardeft 
and fineft. 
Hyacinth, or Jacinth, is of a pale Vermilion 
Colour, or red with a fmall Admixture of yellow,; 
which Appearance it probably receives from Lead 
and Iron. This Stone is not near fo hard as the 
Ruby or Sapphire, but much more fo than any Sort 
of Cryftal: it takes a fine Polifh; and is brought 
us in the greateft Perfection from the Eafl Indies: 
it is alfo found in the Well Indies , and in fome 
Parts of Europe , as Silejia and Bohemia ; thofe from: 
the Eaji are by much the hardeft, 
Granatej 
