C "9 J 



i. Crysolite, colour yellowifh green, inclining 

 to yellowifh brown cryftallized in hexahedral 

 prifms with correfponding pyramids. Anal. Si- 

 lex 15. Argill 64. Lime 17. Iron 1. Achard. 



k. Hyacinth, of a peculiar yellowifh red ; in 

 general retain their colour in fire; cryftallized in 

 dodecahedrons with unequal rhombic faces. AnaL 

 Silex 25. Argill 40. Carbonate of lime 20. 

 Iron 13. Bergman. 



1. Hyacinth of Vesuvius, is generally of a 

 deeper colour than the oriental, and is lefs hard and 

 more fufible. Cryftallized in tetrahedral prifms, 

 truncated at their angles, terminated by tetrahe- 

 dral pyramids, truncated at their fummits. 



m. Olivin, found imbodied in bafaltes; of an 

 olive green colour; cryftallized in fix, feldom in 

 four, fided prifms ; moftiy rectangular, with or 

 without pyramids. The cryftals are longitudinally 

 ftriated; have a vitreous appearance. AnaL 

 Silex 54. Argill 40. Iron 4. Gmelin. 



n. Garnet , Carbuncle, of a red colour, or 

 forhe of it's fhades, a greenifh white, and of vari- 

 ous degrees of tranfparency ; does not lofe it's co- 

 lour in the fire, but becomes heavier, and is ftrongly 

 attracted by the magnet. Cryftallized and pre- 

 senting either 12 rhomboidal planes, or 24 trape- 

 zoidal, or 36 planes, of which 12 are rhombs, and 

 the 24 others elongated hexagons, interpoled be*- 

 tween thefe rhombs, and fome other variations. 

 AnaL Silex 48. Argill 30. Lime 11. Iron io. 

 A chard. 



o. White 



