92 



lization. We here give a representation of what is reckoned 

 the primitive crystal, (viz.) the rhomboidal dodecaedron. 

 These are found in great plenty in the Plum-pudding rocks, 

 as they are called, at Huntly in Scotland. We have bought 

 specimens at sales which are said to come from Bohemia, 

 seemingly of the same sort, and in the same gangue as those 

 from Huntly. The Syrian garnet is of a more scarlet hue, 

 though I have some cut ones, said to come from Scotland, 

 nearly of the same colour, but rather less bright. 



The lower figures are from rocks near the same place in 

 a lighter-coloured gangue (a granite), with the edges of the 

 dodecaedron forming 24 narrow hexaedral facets, in addi- 

 tion to the 12 rhomboidal faces. I have the same sort of 

 garnet, though lighter, in a basaltic stone, and in greenish 

 hornstone from Scotland. Mr. Jameson has found them 

 in micaceous schistus, v. 1. 219. v. 2. 212. External lustre 

 casual, internal 2.3. 1. of the brownish and blackish fre- 

 quently 0. Kirw. Fracture of the hard ones somewhat 

 flinty or conchoidal. Mr. Kirwan calls, the oriental garnets 

 carbuncles z p. 25S. 



TAB. XLIV. 



Shows a variety in a lighter granite gangue with the 

 edges more deeply truncated on the 6 opposite edges, see 

 the right hand and middle figure, making an 18-sided cry- 

 stal. The left hand figure shows the truncation equally- 

 deep of a 36-sided figure. The lower figure forms a prism 

 by 6 sides being elongated. These varieties are more or less 

 distinct in the gangue above, 



