2 ^o Of Gems. Part III* 
caufeth thofe Refractions. Tin and Venk-Glafs melted to- 
(a) Porta, gether, imitate an Of aim. (a) See alfo the Phil. Tranf. 
(*;Num. 3 8. hereof, (b) 
The ONYCOPALUS. By fome called Oculws Cati. ft 
hath the Zones or Rings of the Onyx, of a pale White. The 
beftofthefe are found in Zeilan andFega. Much harder 
than the Op aim. It might be try'd, whether this Stone doth 
in any degree partake of the ftrange property of the Of aim 3 
fome of which, being only fteeped a while in common 
fu\a aCtj ubi water > become Transparent for fome time, (c ) 
The CALCEDONY, /. e. Onyx Chalcedonius, as Kentman 
(d) Foffii. amifs. (d) This is polifh'd and fet in a Frame. Above 
Nomenci. j ncnes l 0 ng, anc j near as broad. Semiperfpicuous 5 al- 
mofthke to a piece of grey Ice. Confifting of white and 
moft perfpicuous parts fo mixed together,as to look in fome 
fort like a Honey-Coome. 
Another fmall one, with a pointed and fexangular polifh 
at both ends. 
This Stone is next in hardnefs to the German Agate. The 
cleared, with a pale caft of blew the beft. In Germany, be- 
ing cut into thin broad Tablets , many have their Arms 
either engraven thereon, or painted on the back-fide 5 pre- 
fering it to Cry ft at, as being harder, if good. Hereof alio 
are made little Mortars for the powdering of Emery 3 like- 
(e) Georg. wife Cups, Religious Beads,i£?c. (e) 
Agric. The SARDIUS or Coniel'wn, qu. Carnelian. A femiper- 
fpicuous Stone. The beft, by fome called The Male, of the 
colour of Flefh, faith Boetiw, with the blood in it. I add, 
but of a living Animal. But this is diluted with fomewhat 
of an Amber-colour. Anciently not only This, but all the 
fmaller Gems, were ufed efpecially for Signets and Signet- 
d{LS eop ' if) 
The SARDONYX. As it were compounded of the 
Sardhcs, and the Onyx. This is polifh' d, and fo the better 
Ihews it felf. It confifteth of White and Blackilh Rings, 
one with in another. And ftained both with red, and pale 
green Spots inter jected. The Rings, with the help of a Glafs, 
appear much more numerous, curioufly reprefenting thofe 
in the Root of Taraxacum or Dan-de-Lyon, cut tranlveriiy. 
Note alfo, That the faid Rings are properly fo call'd, only in 
the polilh'd Stone 3 being, when entire, really fo many Balis, 
as 
