10 



TAB. CCCV1. 



CALX carbonata. 

 Carbonate of Lime, 



Class 2. Earths. Order 1. Homogeneous. 



Gen. Calx * -Spec. Carbonata. 



Div. 1. Crystallized. Var. 



A he present modification is far from common, and has 

 so peculiar an appearance that it must attract the obser- 

 vation of the enlightened enquirer, showing how infi- 

 nitely various may be the modifications of this substance. 

 The edges of the three sides of the column are rounded 

 by repeated facets on that and on the pyramid, and the 

 other three sides of the column are bevilled laterally to- 

 wards the former three, making with them and the pyra- 

 mid a figure like the front of a Gothic arch. The thick- 

 ness of the column, and depth in the proportions of the 

 flatter, or rounding, facets, give this a variable appear- 

 ance. The pyramidal ends are often distinct, and nearly 

 correspond with the primitive rhomb. 



