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Figure/ To pafs by divers, which J havecoHeaec!,! flial! defcribe 
one of a very carious Figure, and which (though very common in 
our blew-Lime-ftone Rocks, out of which plenry of Lead-Ore is 
got,)yet isnotjthac I know of,mention'd by any Author* 
Thefe Cryftals are moftly of a black water,like the black flint in 
Chawk-hills ; but there are of them, which have a pnrpliflb or ame- 
thyftine coIour;and fome there are as clear as cryftaK They adhere 
to the (earns of the rock, be it betwixt bed and bed, or where-ever 
there are crofs and oblique veins through the very fubftance of the 
bed. 
The finaller the veins, the lefs the /m. You will find of them as 
fmallas wheat-corns,and others an hundred times bigger.They flioot 
from both fides the feam,and mutually receive one the other. 
They are figured thus, viz. a column of fix plains very unequal 
as to breadth; the end adhering to the rock is always rugged, as a- 
thing broken off; the other end of the column confifts of three quin- 
angular plains, very little rais'd in the middle : thefe plains too are 
very unequal. Let them hugoneanother,orbeany waysftraightned 
and compreflfed in their (hooting ; yet the number of plains menti- 
on'd,both of the column and top,is moft certain. The p]aces,where 
infinite of them may be had,are Raimborough Scan upon the Rible \ 
airo in a Stone-quarry near Ejhton tame In Cravem 
III. GloffofetratricujfUmn-ferrata, Fig.i.and2. 
Mr.K^^ in his Travels hath thefe words concerning the Gloffope- 
tr^^pdig. 115. Of the Gloffopetrip (faith be') I have not yet heard^thaP 
there have been any found /> England ; vphich I do not a little vponder 
At ythere being Sharl{s frequently taken upon our Coafls. I have had out 
of the Ifle of Shepy in the River of thames^ very Sharks teeth dug 
up there ; which could not be Paid to be petrifi'd ; though,as to the 
colour,they were fomewhatguilded with a Vitriolicktarnifli at our 
firfl receiving them ; but they were whitejand in a fliort titne came 
to their natural colour. 
In the Stone-quarries in HinderskelfPavk near Malton^ I had this 
flone(the feheme whereof I fend you;^. ijthe greateft rarity of this 
kind I ever met with,and which I took out of the rock there my felf;. 
It is a idSrGloffopetravflih 3 paints,of a black liver-co!our,& finooth;. 
its edges are not ferrate ; its bafts is (like the true teeth) of a rugged' 
fubfl:ance; it is carved round,the bafts with imboOed work : It hath 
certain eminent ridges or lines like rays drawn from the bafisxo 
each point. 
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