NOME VIII. KOLLANITE, 



In this piece may also be observed a very 

 large pebble, split in two, but not displaced, the 

 crack being filled by the cement, which is of a 

 dull white, or light grey colour. A pebble, with 

 a portion of the cement in the centre, and every 

 where inclosed by the substance of the pebble. 

 Another, with the same circumstances. One 

 pebble, with a cavity containing small quartz 

 crystals. A pebble, in the state of indurated 

 clay, and easily cut with a knife, being enve- 

 loped, but not penetrated, by the siliceous mat- 

 ter. 



11. Very small delicate pebbles, of a bluish 

 grey, in a straw-coloured cement. 



12. Cement, half red, half yellow, with dark 

 pebbles. 



13. Yellow and red pebbles, in a cement of a 

 whitish grey ; but tinged with a fine red on the 

 side of some pebbles, and with yellow near 

 others, as if the pebbles had yielded a part of 

 their colour when the cement was introduced. 



14. Pebbles of white quartz, in a deep red 

 cement. 



15. A beautiful piece, found in the ruinous 

 part of the abbey of St. Albans. Cement grey, 

 with delicate tinges of red and yellow. Of the 

 larger pebbles, one is yellow, with spots of red; 

 others yellow, with zones of white chalite, and 



