C 43 1 
dippe Hills in Somerfetjhire, lying near the Surface 
of the Earth. 
In one of the Tables near the Windows on the 
Right-hand are a great Number and Variety of 
Agates, Onyxes, and Sardonyxes, rough and po- 
lifhed; fome of them are fmall like Seeds, which 
in the Beds where they are found, meeting with 
proper Particles, by a natural Coalition, and affifted 
by the Heat of the Sun in thofe warmer Climates, 
ericreafe in Bulk. The Eaft India Agats are much 
finer than thofe of Bohemia , America , or any other 
Part of the World. Among the moft curious of 
the Specimens are two Pendants fee in Form of q 
Heart, each having by Nature delineated on it a 
tolerable Reprefentation of an Eclipfe, one of the 
Sun, the other of the Moon: their Drops are 
Onyxes. 
The Onyx is a femi-tranfparent Stone of the 
Agate kind, (often imitated by the Lapidaries with 
Agate) it has various coloured Zones, but none 
fed; and is compofed either of a Number of flat 
Plates, or of a Series of Coats round a central Nu¬ 
cleus : the Lapidaries fliew their Ingenuity in con¬ 
triving to cut them in fuch a Manner, as to have 
Figures or Hiftories on them in Bafifo Relievo with 
the Ground of a different Colour: thefe Pieces of 
Sculpture are called Cameos. The Onyx is found 
in fcveral Parts of the Eaft Indies , in Mexico , Italy , 
Bohemia , and many Places in Germany : ir is formed 
of Cryftal debafed with a fmall Admixture of 
Earth. 
The Sardonyx is of the Onyx kind, and is either 
zoned or tabulated •, it is compofed of the true 
Matter of the Onyx, but variegated with Zones or 
Plates or that of the red or yellow Cornelian, whence 
its Name: it is by the Lapidaries divided into fe- 
vera! 
