88 O F S T O N E S. 



the Tweed, called the Shingles, oppofite to JVor&HM-caftle. It is of 

 an irregular rugged fhape, five inches long, three inches in 

 diameter, and two inches thick -, very heavy. It is capable of 

 an elegant polifli. I have another of an hemifpherical fhape, 

 with veins, wavy, in beautiful meanders ; from the fea-more, 

 by Druridge, near Widdrington. It is two inches and a quarter 

 long, and two inches in diameter ; ponderous. The jewellers 

 generally ufe thofc that arc fimple-coloured, and prefer them 

 before thefe elegant varieties with veins. They cut out the 

 zones or eyes, and fet them in rings. 



The green gem, with a flight admixture of a brafly yellow, 

 the chryfolite of modern times, and the topaz of the antients (g), 

 is fometimes found on the more of the Coquet ; from which I 

 have a fine one, of an oval fhape, a little flatted on one fide, 

 fomcwhat larger than a nutmeg, with a natural polifli ; opake, 

 and of little efteem with jewellers, though in its perfect ftate of 







-great beauty. 



\Ve have not the true chryfolite of the antients, fo called from 

 its elegant gold-yellow, the topaz of the moderns (h). The 

 .Scotch dealers in gems carry on a large trade with what they call 

 Topazes from the Highlands, which, when put to trial on the 

 wheel, arc found .-only ,to be cryftals, tinged by metalline par- 

 ticles. Moft of the topazes ufed for feals and rings arc of this 

 kind. 



The gem, called the Amber-Hyacinth, from its being tinged with 

 red, and a large admixture of an amber-yellow ()}, is fometimes 



(g) Chryfolithus ; qui top;izitis anliquorum. /////. Hift. FolT. 1:98. 

 (h) Xopazius; qui chryfolithus antiquorum. Id. 599. 

 (!) Hvacinthus, Id. p. 593. 



found, 



