22O TRAVELS THROUGH 



tirely different from the Sicilian jafper. Cubic 

 pyrites or marcafite-dice went under the name of 

 fietra quadrat a. 



II. Lumaclella. 



Is limeftone or marble, filled with petrifactions 

 of Ihells. I have fcen feveral varieties at Rome, 

 which paffing for antique fold very dear ; fuch as, 



1. Grey-brown lumachella, with white tranf- 

 parent agate, like veins. 



2. Ditto, with rofe-coloured flripes ; beautiful 

 and fcarce. 



3. Ditto, with fmaller Ihells, called cajtracana -, 

 extremely dear. 



4. Yeilow-brownim lumachella, with plenty of 

 irnall black (hells. Befides them they employ the 

 lumachella of Sicily and Calabria abruzza. 



III. Oriental Alab after. 



1. White tranfparent, now and then with thin 

 parallel milk-white ftripes. 



2. White opaque, milk-coloured. 



3. Alabaftro Tartarucato, brown, like turtle- 

 fhell, fcarce femipellucid, fometimes veined or 



watered, 



