(481 ) 
cold Water 5 in the middle of which one might perceive 
fuch Slits or Cracks as one might compare w the Top or 
Cieling of an Unwainfcoited Church within fide, which 
was no unpleafant Speftacle, but con’d not be fo well 
traced by the Painter as it ought to have been; but whe- 
this Appearance be natural to the Diamond, or whether 
it proceeds from the breaking it in Pieces, is unknown to 
me ; but my Opinion is, that it was nor occafion d by 
its being made red hot, and thrown afterwards into the 
Water, for it it had been fo, the Diamond wou d have 
been feparated into a great many Particles, or one woud 
have difeovered feveral Cracks or Flaws in it: For a cer- 
tain Goldfinith having bought feveral fmall Stones tor 
Diamonds, and'which many People wou’d have taken tor 
precious Stones, be gave me three or four of them to vie w, 
and I prefently judged them not to be Diamonds, tor 
they had neither fliarp Points nor fmooth Sides, but ap- 
oeared like tranfparent Panicles of Sand, whofe Angles or 
Points were worn off; he allow’d me alfo to make tljein 
red hot, and to throw them into the Water afterwards, 
which I did, and obferved by the help of my Microfcope, 
that they had got a great many Rents or Cracks m them, 
infomuch that with a little fqueezmg they wood crumble 
'all to Pieces. ^ , r n o • 
Be- 4* S, T. V. W. X. Y. reprefents the fmall Parti- 
cle of a Diamond, no bigger to the naked Eye than a 
fmall Grain of Sand, from whence you may )adge alio ot 
the lareenefs of the other Diamond Particles, reprefent- 
' ed by the preceediog Figures 5 this laft mention’d Parti- 
cle was not put into the Fire. You may alfo obferve at 
S. T. V. W. and Y. the fliarp Points of the faid Par- 
ticle 
From whence I conclude, that I was right in my for- 
mer Remarks concerning the Particles of Sand ; to wir, 
that the faid very fmall Particles confifting ot regular 
Cccc Points 
