5 1 6 Of Stones Irregular. Part III. 
it hath feveral Circles one within another, as if drawn with 
a pair of Compaffes on a Slate 3 or as in the Onyx 3 from 
whence I have nam'd it. The bigeft Circle is about an inch 
and 5 in Diametre. 
Two pieces of EGYPTIAN MARBLE. Confining of 
a blackifh Ground, as it were inlaid with little Green pieces, 
moft of them of an oblong fquare Figure. 
A Piece of the worft fort of CORNISH MARBLE, ufed 
for Lime. A blewifh Stone, mixed with fome whitifh 
fparry Veins 3 and fome of a redifh-flat, of the colour of 
Terra Lemnia rubra. Marbles, befides the places mentioned, 
are* found in Italy, Germany \ Cappadocia, Hetruria, Numidia, 
and other parts. The ufes are as known, as great. 
LAPIS LAZULI,/.e.Blew-Stone 3 Lazuli being thcArabick. 
word for a blew colour. Whence alfo the corrupt Italic^ 
Azure. It confifteth of parts of a full Blew(ufually with fome 
yellow fpecks) immerfed in a dull Bed, bordering upon the 
colour of Fullers- Earth. On this here, grow fome pieces of 
Spar, fo hard as eafily to write in Glafs. 
Another Piece growing to an afh-colour'd and foftifh 
Stone, diffoluble with Spirit of Nitre. 
This Stone is ufually found in Gold Mines in Africa 
and Afia. Of two kinds 3 The fixed, which being put in 
to the fire, keeps its colour 3 The Not fixed, alfo in Ger- 
(a) Boet.de many, (a) Plereof are fometimes made Knife-Hafts and 
Lap. & g. sp 00ns ^ g ut efpecially that moft excellent BLEW, called 
VLTRAMARINE. The manner of preparing it, is very 
(b) From largely and exactly defcribed by Boetius. (b) The powder 
to%i 2 & nereo * given to the quantity of 30 {or more or lefs) is 
141. an innocent and ufeful Cathartick. (c) It will fometimes 
ius Braffa, °" wor k Vomit. Hath been fuccefsfully ufed in Quartans 
(d\ Fiora- and Malignant Fe 'avers. And yields a Narcotick^Oil. (d) 
vantus. The Fading BLEW-STONE. Lapis Armenia. This 
piece confifteth of Blew and Green parts mixed together. 
And the blew parts themfelves, at leaft, the colour made 
of them, will in time turn green. Tis fofter than Lazuli, 
and not infenfible of Acids 3 and of Oil of Vitriol more, than 
of Spirit of Nitre. 
Another Piece of L. Armenius 3 confifting of Blew parts 
immerfed in a hard and redifh fand-colour d Bed, with a 
Green piece growing to one fide. Given by Henry Olden*- 
hurge 
