28 



specimen, although more really valuable than glaring ; and 

 besides, a book of crystals merely cannot be so valuable, 

 and can convey no idea of the specimen it was taken from, 

 and which it ought to elucidate. 



The right hand middle figure shows the Quartz crystal 

 magnified, and the left hand one shows a crystal detatched 

 from the group of Garnet-like crystals of Carbonate of 

 Lime. 



The Ouartz is extremely rich externally with iridescent 

 colours; but this is lost in smallness. 



