ORDER I. OCTAHEDRAL FLUOR-HALOIDE. 69 



perior quality of that produced at Tolfa is ascribed to the 

 employment of this mineral. 



GENUS IV. FLUOR-HALOIDE. 

 1. OCTAHEDRAL FLUOR-HALOIDE. 



Octahedral Fluor. JAM. Syst. Vol. II. p. 587- Man. 

 p. 29. Fluor. Fluate of Lime. PHILL. p. 168. Fluss. 

 WERN. Hoffm. H. B. III. 1. S. 94. Fluss. HAUSM. 

 III. S. 876. FlusssaurerKalk.LEONH.S.561. Chaux 

 fluatt'e. HAUY. Traite',T. II. p. 247- Tabl. comp. p. 8. 

 Traite', 2de Ed. T. I. p. 505. 



Fundamental form. Hexahedron. Vol. I. Fig. 1. 

 Simple forms. H (z), Alstonmoor; O (P) Vol. I. 



Fig. 2., Moldawa, Bannat; D (*), Vol.1. Fig. 31., 



Ehrenfriedersdorf, Saxony. As (#), Vol. I. 



Fig. 32. ; As (#), Cornwall ; B, Vol.1. Fig. 33. 



Ci, Vol. I. Fig. 34-. ; Ca (u), Zinnwald, Saxony ; 



Ts (w) Vol. I. Fig. 35. 

 Char. of. Comb. Tessular. 



Combinations. 1. H. O. Vol. I. Fig. 3. and 4. St. 

 Gallen, Stiria. 



2. H. D. Fig. 151. Falkenstein, Tyrol. 



3. H. As. Fig. 148. St Agnes, Cornwall. 



4. H. Cs. Fig, 149. Zinnwald, Saxony. 



5. H. Ts. Matlock, Derbyshire. 



6. O. As. Altenberg, Saxony. 



7. H. O. D. Schwarzenberg, Saxony. 



8. H. D. Ce. Falkenstein, Tyrol. 

 Cleavage. Octahedron, perfect and easily obtain- 

 ed. Dodecahedron and hexahedron sometimes 

 distinct in the green varieties from Alstonmoor, 



