SYNONYMES, AND PRIMARY FORMS. 487 



earthy, mixed with other substances, 

 slaty ; Polishing slate, 

 compact; Rotten stone ; Trepoli. 

 amorphous ; common, 

 blue ; Siderite. 

 greasy. 

 avanturine, containing numerous minute fissures, 



or scales of mica, 

 iridescent, 

 pseudomorphous. 



penetrated by Asbestus ; Cats-eye. . 

 fetid, 

 black opaque: Basanite ; Lydian -stone. 



.^ slaty. 



jasper; common, 

 red ; Sinople. 

 spotted. 

 Ribbon jasper. 

 Porcellain jasper, 

 agate. 



calcedony. 



crystallised. The crystals are pseudomor- 

 phous, and probably have taken the form 

 of Fluate of lime. I have found the 

 mutual inclination of the planes to be 

 90 by the reflective, goniometer, 

 stalactitic. 

 blue, 

 pale green, coloured by Arseniate of nickel ; 



Chrysoprase. 

 dark green ; Plasma. 



with red dots ; Bloodstone ; 



Heliotrope. 

 Carnelian. . 

 white, 

 yellow, 

 red. 



brown ; Sardonyx. 



spheroidal, in concentric layers, or bands ; Agate, 

 in parallel layers or bands ; Onyx, 

 veined. 



dendritic ; Moss agate ; Mocha stone, 

 breccia agate. 

 wood agate. 



mixed with clay ;, Jasper. 

 Egyptian pebble. 



