3 o8 Of Regular Stones. Part III. 
the Angle of one, for the mofl part, anfwers to the fide of 
another. Of a pale and femifperfpicuous colour, coming 
near to that of white Sugar-Candy. In which alfo fmali 
parallel Streaks of a brighter colour, are obfervable. Very 
foft, as the former, and diffoluble with Sprit of Nitre. 
The STYRIATED STALACTITES. Of the fame kind 
with the Styriteformis defcribed by Wormius. It is a con- 
geries of flrait, round Styri<x, fomewhat parallel, and as 
thick as a Cherry-Stalk, or fmall Packthred. Each Styria 
is compofed of fmall, pointed and lofe Grains, as big as 
thofe of ^//,piled in a ftrait line one over another. It makes 
an Efervefce?ice with Sprit of Nitre. 
The MOSSE-STALACTITES. Confiding alfo of Gra- 
nulated Styritf^ yet not ftrait and parallel, but winding 
too and fro, and the Grains with bigger points 3 fo as to re- 
ferable petrify 'd Mojfe. 
I NEXT proceed to PLATED-STONES 3 md firft fucli 
as are of a Rhomboid Figure. 
A CRYSTAL of TALK. Wormius defenbes Tali, to 
be a Stone divifible into flat Plates, varioufly intricated, 
and divifible like Silver, which is all he faith of the form, 
and his words unintelligible. Far from a definition of that 
form, which, fo often, as its Concretion proceeds freely on 
all fides, or without hinderance from any adjacent Body, it 
doth obtain : being then, a Congeries of flat, and perfpi- 
cuous Plates, fomewhat pliable, and figur'd into a kind of 
double Rhomboid 3 or as it were two Squares, with un- 
equal Sides and Angles, clapt together, with the edges pro- 
duced, to diftinguifh them : fo, as to obtain twelve Angles, 
and ten Sides, fc. eight lefier, and two greater ones. A piece 
thus figur'd, I call A Cryftal of Talk,. And of this the form 
is both Accumidative and Circumfcripive ; the difference 
betwixt which is fhewed in the beginning of this Chapter. 
An HALF-CRYSTAL, having only fix fides, four lefier, 
and two greater ones 3 as if it were a perfect one, fplit. 
A piece of FOLIATED TALK. It confifteth of feve- 
ral pieces, pellucid, cleveable, and fomething pliable, of a 
, Rhomboid Figure, and compofed together fo as to refem- 
ble the indented leave of Wild Clary. 
A large Piece of TALK, above * a foot fquare. 
A Piece of TALK taken out of the Ground in Wiltfbire. 
A 
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