CHAP. 42.—CHRYSOLITHOS: SEVEN VARIETIES OF IT.
Æthiopia, which produces hyacinthos, produces chrysolithos1
also, a transparent stone with a refulgence like that of gold.
The stones of India are the most highly esteemed, as also those
found among the Tibareni,2
provided these last are not of a
mottled hue. The worst in quality are those of Arabia, the
colour of them being turbid and mottled, and their brilliancy
interrupted by cloudy spots: even too, when they happen to
be limpid, they have all the appearance of being full, as it
were, of a peculiar dust. The best stones are those which,
when placed by the side of gold, impart to it a sort of whitish
hue, and so give it the appearance of silver. When this is the
case, they are set in a bezel that is open on either side; but
when the stone is of inferior quality, a ground of aurichalcum3
is placed beneath.