ORDEH IV. PRISMATIC AZURE-MALACHITE. 167 



malachite. Even though we should not pay attention to 

 the geometrical characters, hardness and specific gravity 

 would be sufficient for their distinction. 



2. It occurs engaged in cavities of rhombohedral Quartz, 

 and associated with pyramidal Copper-pyrites, in a bed in 

 primitive rocks, at Libethen near Neusohl in Hungary ; 

 also at Gunnislake in Cornwall. 



GENUS IV. AZURE-MALACHITE. 

 1. PRISMATIC AZURE-MALACHITE. 



Blue Copper or Prismatic Malachite. JAM. Syst. Vol. II* 

 p. 313. Prismatic Blue Malachite. Man. p. 98. Blue 

 Carbonate of Copper. PHILL. p. 309. Kupferlasur. 

 WERX. Hoffm. H. B. III. 2. S. 134. Kupferlasur. 

 HAUSM. III. S. 1020. Kohlensaures Kupfer (in part). 

 LEONH. S. 276. Cuivre carbonate' bleu. HAU Y. Traite', 

 T. III. p. 562. Tabl. comp. p. 89. Cuivre carbonate' (in 

 part). Traite, 2de Ed. T. lit. p. 488. 

 CORDIER. Ann. des Mines. Vol. IV. p. 3. 



Fundamental form. Scalene four-sided pyramid. 



{llfio >jr\ 

 118 16'}' 107 ^ 104 T ' Inclination 

 of the axis = 2 21' in the plane of the short 

 diagonal. Vol. I. Fig. 41. R. G. 



a : b : c : d = 24-30 : 25-25 : 28'70 : 1. 



C- 1 f T> /\ P J*l / 116 7' I 



Simple forms P QD (s); -f_- 4.J = 1 113 jfi'j ; 

 P + 00 (/) = 97 24'; - ( -^-^' (*); 



+ <z>) 5 (P) = 59 14'; (fr + <x) 5 (1) = 

 119 18<; ^(0; ( ^i^*>; 

 fr 1 (g) = 134 7' ; Pr (M) = 99 3^; 



