P a r t III. Of Regular Stones. 505 
Mr. Lyfter hath given a particular Account of this 
Stone , and its varieties in feveral Figures ; publifhcd by 
Mr. Oldenburge , (a) together with fome Notes of Mr. Ray M Phil, 
thereupon. Mr. Lyfter found the faireft of them near Bug- 7 t jf N ' 
thorp and Leppington in Tor/^Jhire, in a blew Clay. 
The STARRED-STONE. AJlroites. So called, for that 
being tabulated, or polifh’d to a plain, it appears adorned 
with little Stars, about $ or i th of an inch in Diametre. 
Boetius conjectures Pliny to reckon this St one for a fort of 
Agate. Whether that be fo or no, himfelf is greatly 
miftaken (i>) in affirming as much : this being a very foft 0 >) Lib. 2. 
Stone. The fame Author takes notice, as of a ftrange c * H5 ‘ 
thing, That this Stone being put into Vinegar (c) will move COC. 147. 
up and down in it. Whereas it proceeds (as Mr. Lyfter 
alfo obferves of the Afleria , which he calls the AJlroites) ( f ] £ hil 
only from the Ebullition following upon the immerfion: ™' 
and happens to any other Stone diffoluble with Acids, if 
immerfedin fmall pieces. 
Another, two inches long, and near as broad. This is 
unpolifh’d, and feems to be but part of a far bigger Stone. 
So that although the figure which Boetius, and fome others 
give, is but fmall, fc. not an inch long: yet is it fometimes 
of good bulk. 
The ASTROCHITES; polifh’d with the figure of a 
Crofs. The Stars are here more round, than in the former. 
The fpaces between the feveral Stars and Rays, of a dark 
blackifh colour. The Rays or Stars themfelves are pale. And 
alfo furrounded with a toothed Circle 5 fo as not unaptly 
to reprefent the Wheel of a Watch : from whence I have 
nam’d it. 
The imperfect STARRY-STONE. AJlroites Boetio (e) « Lib. 2. 
quart us. In this the Stars are more obfeure, and fcarce ra- c ' l64 ‘ 
diated, but rather fpots. But the Stone for fubftance the 
fame as the former. 
The WAVED Stone. AJlroites Boetio (f) tertius 5 but (f) ibid, 
improperly fo call’d. For although it be, for fubftance, 
like the former 5 yet is not adorn’d with the likenefs of 
Stars, but of Waves. The feveral Waves are compofed of 
whitifh tranfvers Striae. 
Another, with the Strict more confpicuous. 
The SEIVE-STONE. Lapis Cribriformis. A kind of 
R r Tophus. 
