146 Elements of Mineralogy. 



IV. VARIETY. 

 Jade> Shoerly and Garnet. 



Of confiderable hardnefs and weight, with 

 large fpots of red, green, and yellow ; the 

 garnet red. the fhoerl green, and the jade yel- 

 low. Sauffure, p. 107. 



V. VARIETY. 

 Quartz* Felt-fpar, and Shoerl y 



Granite. 



Thefe are fo well adapted to each other, 

 that, as Mr. SauJJure well remarks, they 

 could not have been fo compa&ed by an ac- 

 cidental mixture of mafles previoufly formed, 

 but muft have cryftalized together.- It may 

 be feen among the paving ftones of London. 

 The quartz is white, the fhoerl black or vio- 

 let, and the felt-fpar reddifh. 



VI. VARIETY. 

 Pudding/lone^ Breccias. 



Stones which confift of a filiceous ground 

 or cement, (commonly petro-filex, jafper, or 

 filiceous grit) in which pebbles of filex or 

 agate are interfperfed j if thefe be round or 

 oval, are called pudding ftones \ if angular* 

 breccias. Of the coarfer forts mill-ftones are 

 .often made. Mem. Par. 1758. 



VARIETY. 



