60 CALCAREOUS URAN-MICA. 

 stance their preservation is probably owing, 

 as it was found to be less laborious to go to 

 the quarries in the neighbourhood from 

 which the stone was originally raised, and 

 procure the soft stone there, than to break 

 up those of which the temples are con- 

 structed. 



Brit. Mus., Case 46. 



M.P.G. Upper Gallery, Wall-case 40, 

 Table-case B, in recess 6, Nos. 207 to 223. 



Calcareous Uran-mica, or Calcare- 

 ous Uranite. See Uranite. 



Calcedony. See Chalcedony. 



Calcedonyx. The name given to those 

 varieties of Agates in which opaque white 

 Chalcedony or Cacholong alternates with 

 translucent greyish Chalcedony. 



Calciferrite, J. R. Blum. A mineral 

 related to Vivianite. Occurs crystalline foli- 

 ated. Colour sul phur-y ello w to siskin green 

 and yellowish -white. Translucent in thin 

 lameilffi. H, 2-5. fe.G. 2-523 to 2-529. 



CALCITE. 



Fig. 71. 



Fig. 72. 



Analysis by Reissig : 

 Phosphoric acid . 

 Alumina 



Peroxide of iron . 

 Lime . 

 Magnesia 

 Water . 



. 34-01 

 . 2-90 

 . 24-34 

 , 14-81 

 . 2-65 

 . 20-56 



99-27 



BB yields a black shining magnetic 

 globule. 



Easily decomposed by muriatic acid. 



Locality. Battenberg, in Rhenish Bavaria, 

 forming nodules in clay. The exterior of the 

 nodules is massive, and consists of impure 

 or altered Calciferrite of a yellowish-brown 

 or reddish-brown colour. 



Calciform Copper Ore. The name 

 under which Kirwan comprised the different 

 varieties of carbonate of copper. 



Calcite. Hexagonal, rhombohedral : oc- 

 curs crystallized in upwards of 800 varieties 

 of form, nearly 700 of which have been figur- 

 ed by Count Bournon, in his treatise on Car- 

 bonate of Lime. The primary form is an ob- 

 tuse rhombohedron, which may readily be 

 obtained by cleavage, and may itself be occa- 

 sionally cleaved parallel to a plane passing 

 through the greater diagonals in one direc- 

 tion. Colour usually white, but sometimes 

 of various shades of grey, red, green, or 

 yellow, owing to the presence of iron, mag- 

 nesia, bitumen, or other impurities. Lustre 

 vitreous to earthy. Transparent to opaque. 

 Streak white or greyish. Cross fracture 

 conchoidal, but not easily obtained where 



Fig. 81. 



Fig. 82. 



Fig. S3. 



the specimen is crystallized. 

 S.G. 2-5 to 2-7. 



H, 2-5 to 3-5, 



