495 



5°! 



502 



505 



26 



SILICA GR UP— Continued. 



492 Jasper — contiiiued. 

 Blackish brown. 



Loc, Dolcoath. 

 ^ Obs., Presented by Mr. R. Pearce. 



493 Do. Brownish yellow. 

 Loc, St. Just. 



494 Do. Reddish-brown, with Quartz. 

 Loc, Ting Tang. 



Do. Brown. 



Loc.^ Ting Tang. 



496 Do. (b. Ferruginous Opal. ) — Red mass. 

 Loc.., Huel Gorland. 



497 Do. Red mass. 

 Loc.^i Hue! Gorland. 



498 Do. Yellowish-brown, with Mispickel. 

 Loc.., Huel Gorland. 



499 Dark and light-brown, with Pyrites. 

 Loc.., Huel Gorland. 



500 Do. Brown, with Fluor, Quartz, and Pyrites. 

 Loc.^ Huel Gorland. 



Do. Pale brown. 



Z(7<r., Ting Tang. 



Do. Chocolate brown. 



Log., Huel Gorland. 



503 Do. Brick red. 

 Loc, South Huel Basset. 



504 Do. Bright-red. 

 Loc, Ting Tang. 



Do. Dark brown. 



Obs.., From the Burncoose collection, 1850. 



506 Do. {c. Riband Jasper.) — Brown and red. 

 Loc, Norway. 



1 182 Do. (d. Heliotrope, Bloodstone. ) — Dark-green, polished, 



507 Do. (e. Agate.) — Polished brown specimen. 



Obs., Presented by Mr. J. H. Collins. 



