FiGL'KE 3. 

 Crystal of Jaigoon or Zircon 

 (actual size). 



Wlifii cut as facetted stones, 

 jarsjoons possess the power of 

 ilispersiim of liglit approachint; 

 in some cases to that of the 

 diamond. 



1 U.lKl. 



Crystals of Alexandrite uctiial size). 



riie aleNaiulrile and cat's-eye are both varieties of the mineral clnysobervl. 

 and in very rare cases the cats-eye \ariety also possesses the power of 

 alteration of colour. Although Ceylon is the chief source of the alexandrites 

 and the sole source of the cat's-eye, the most choice specimens of the former 

 are derived fromSiberia. 



These jjems are almost colourless and transparent bv transmitted lijilit. but display when cut with a smooth convex surface 



(en cil'n. Iii.iit n i>l,ii, ,„■ 1,1, 1, .,1) Mr,.,], ,,t v;„,i iri.ni v>'.i.h iliev take their name. 



