31 6 Of Stones Irregular . .Part III. 
it hath feveral Circles one within another, as if drawn with 
a pair of Compares on a Slate ; or as in the Onyx ; from 
whence I have nam’d it. The bigeft Circle is about an inch 
and i in Diametre. 
Two pieces of ^EGYPTIAN MARBLE. Confiding of 
a blackilh Ground, as it were inlaid with little Green pieces, 
moil of them of an oblong fquare Figure. 
A Piece of the word; fort of CORNISH MARBLE, ufcd 
for Lime. A blewiih Stone, mixed with forne whitiih 
fparry Veins; and fome of a rediih-flat, of the colour of 
Terra Lemnia rubra. Marbles, bcfides the places mention’d, 
are found in Italy , Germany , Cappadocia, Hetruria, Numidia, 
and other parts. The ufes are as known, as great. 
LAPIS LAZULI,/.e.Blew-Stone; Lazuli being the ArabicQ 
word tor a blew colour. Whence alto the corrupt Italicf, 
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 aih-colour’d and foftiih 
Stone, dilfoluble with Spirit of Nitre. 
This Stone is ufually found in Gold Mines in Africa 
and Afia. Of two kinds; The fixed, which being put in 
to the fire, keeps its colour; The Not fixed, alfo in Ger- 
u &g dCmany ' ^ ^ crco ^ are fonietimes made Knife-Hafts and 
F '' Spoons. But efpecially that moil: excellent BLEW, called 
ULTRAMARINE. The manner of preparing it, is very 
(i>) From largely and exactly defcribed by Boetius. (b) The powder 
^ crco * given to the quantity of 3d (or more or lefs) is 
141. an innocent and ufetol Cathartic 4 (c) It will fometimes 
lus. Brafra, °" w °rk by Vomit. Hath been fuccefsfully ufed in Quartans 
id> Fiora- and Malignant Feavers. And yields a NarcoticQOil. (d) 
The Fading BLEW-STONE. Lapis Armenius. This 
piece confifteth of Blew and Green parts mixed together. 
And the blew parts themfelves, at lead:, the colour made 
ot them, will in time turn green. ’Tis fofter than Lazuli , 
and not infenlible of Acids ; and of Oil of Vitriol more, than 
of Spirit of Nitre. 
Another Piece of L. Armenius ; 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- 
burge 
