TRAVELS THROUGH 



delloni. The argillaceous beds in the pietra forte 

 and ferena go under the , fame names if moulder- 

 ing. See Sajfi tfiatti. 



15. Gbiarra; fmall detached ftones or blunted 

 flint, quartz, limeftone. Larger ones are called 

 Ciottoli and Ciottoloni. 



i 6. Granitone ; a ftone, confifting of a greenifh 

 filver-glimmer, and white vitrefcent fpar or feld- 

 fpath, found in large beds in the Gabbro. Sprink- 

 led by fmall fpots and fragments into the Gabbro, 

 they call it Gram to, Grappi. See Piomlo. 



17. Igiada; is a hardened lapis nephriticus or 

 hip-ftone, or a green horn-ftone (petrofikx viri- 

 dis), whofe origin from green fmedites or foap- 

 flone appears plainly in feveral of thefe ftones in 

 my pofleffion, which on one fide are hardened and 

 ftrike fire, and on the other are fo foft as to be cut 

 with a knife. Sometimes this green fmectites in 

 the fir'ft degree of induration takes the form of 

 afbeftus j or, it is a true albert and amianth, as in 

 the Serpentine quarries at ZoeMtz in Saxony and 

 as in feveral pieces from Impruneta in the Florentine 

 territory, orfromPrato, which I faw in Mr. Targi- 

 cni's colledion. On my return from Rome and Na- 

 ples I mail not neglect to examine thefe places. The 

 pretended 'Prcjius (I'/ all* Mitt. 120, n. 3.) from 

 Breilenbdum y at Johan-Georgmjladt, and from El- 

 fanjlcck in Saxony, feems to have had a fimilar 

 7 origin. 



