TAB. LXXIII. 



CALX Fluor, rar. 

 Filiate of Lime, or Fluor. 



Class 2. Earths. Order 1. Homogeneous, 

 Gen. 3. Lime. Spec. 3. Fluate. 



1 hese specimens are among the rarest of the fluors known 

 in Great Britain. The tipper one is in the possession of my 

 very generous friend Philip Rashleigh, Esq. F.R.S. &c. of 

 Menabilly in Cornwall, whose work and grand collection of 

 British minerals are well known. It is an instructive speci- 

 men, having the form of a purple octaedral nucleus within- 

 side, and the green modification in order about it, which adds 

 to its beauty as well as curiosity. One side of this octaedron 

 has many small but perfect cubico-octaedrons (or cubes with 

 the corners truncated) of pyrites. The next specimen in 

 value I have the pleasure to possess myself. It is somewhat 

 rougher and rather duller, standing on a confused octaedron, 

 the corners of which are rather prominent, forming, as it were, 

 irregular steps; it includes a small octaedron greener than 

 the rest, but rather obscure, within which is a smaller pur- 

 ple one, but which is not to be seen without turning the 



