[ 62 1 



47« Jasp.is. Opakc, changing its colour in the fire, not 



melting by iifeif, breaking into convex 

 fragments. 



48. Lazulus. Hardilli, opake, of a fky-blue colour, not 



lofing its colour or effervefcing by acids 

 fprinkled upon it. 



49. Smiris. Ot no determinate Ihape, melting with great 



difficulty, very hard. 

 50 CiRCONius. Ponderous, very Ihining within, breaking in- 



to incurved piates. 



51. Amarus. Tenacious, green, of Ihivery texture. 



52. Lydius. FifTile, opake, of a dull colour, and of fhi- 



very texture. 

 53. Chlorogranatus. Green, cryltallinc, eafily melted by fire. 



54. Arena. Confiding of dry hard rough granulations. 



55. QuARTZUM. Refifling the greateft degrees of heat, and all 



acids except the fluoric: fragments angular. 



56. ChalcedoNIUS. Refilling the greateft degrees of heat, and all 



acids : fragments more convex. 



57. Adamas. Very hard, evaporating in fire with a flame. 



ORDER VI. ADAMANTINE. 



58. Adamantinus. I^tfifting heat, fixed, hard, lamellar, 



ORDER VII. AGGREGATE. 



59. Granites. Confifting of granular particles united toge- 



ther without vifible cement and wiihoiit 

 regular order 



60. Gneissum. Of a lamellar texture. 



61. Porphyrius. Cryltal'ine panicles imbedded in a ftony pafle. 



62. Amygdalytes. Giinduies more or lefs rounded imbedded in 



a iioiiy mafs. 



6^, Breccia. Fra^nKurs of ftone congiutinated by a ftony 



or meiaiiic cement. 



64. Are;narius. G inidaiions of iiliceou'^ ftones congiutinat- 



ed by a Itony or metallic cement. 



