CATALOGUE OF GEMS AND PRECIOUS STONES. 43 



Step-brilliant, elliptical girdle; pale orange-yellow; 0.646 carat; 6 by 4.5 

 by 3 mm. Isaac Lea collection No. 100 



Step-brilliant, rectangular girdle; deep yellow; 0.465 carat; 5 by 4 by 3 

 mm. Isaac Lea collection No. Ill 



UNITED STATES. 



Montana. 



Brilliant, circular girdle; yellow; 1.34 carats; 6 by 4 mm. Isaac Lea col- 

 lection No. 1003 



Brilliant, circular girdle; pale green-yellow; 1.10 carats; 5.5 by 4 mm. 

 Isaac Lea collection No. 1004 



Brilliant, rectangular girdle; pale yellow; 0.76 carat; 6 by 4 by 3.5 mm. 



Isaac Lea collection No. 1006 



Brilliant, rectangular girdle; deep yellow; 0.707 carat; 6 by 5.5 by 3 mm.. No. 159 



Brilliant, circular girdle; pale yellow; 0.64 carat; 5 by 3 mm. Isaac Lea 

 collection No. 1005 



Step-brilliant, circular girdle; deep yellow; 0.5 carat; 4.5 by 3 mm. Isaac 

 Lea collection No. 1009 



Brilliant, circular girdle; deep yellow; 0.5 carat; 4.5 by 3 mm. Isaac Lea 

 collection No. 1010 



Brilliant, rectangular girdle; pale yellow; 0.435 carat; 6 by 3 by 2 mm. 

 Isaac Lea collection No. 1007 



Brilliant, circular girdle; pale yellow; 0.405 carat; 4 by 2.5 mm. Isaac 

 Lea collection No. 1008 



Brilliant, square girdle; pale yellow; 0.266 carat; 4 by 2 mm No. 161 



Rock Creek, Granite County: 



Brilliant, circular girdle; 4 gems deep yellow, one pale yellow; total 

 weight 1.8 carats; average size, 4 by 3 mm No. 1025 



North Carolina. 



Corundum Hill, Macon County: 



Step-brilliant, rectangular girdle; pale yellow; 1.92 carats; 9 by 7 by 5 

 mm No. 163 



CROCIDOLITE. 



Crocidolite, also known as " Tiger Eye," is a fibrous, asbestiform 

 mineral which in many cases, through the oxidation of the iron and 

 an infiltration of silica, has become altered into a hard, compact 

 siliceous stone, with often a beautiful chatoyant play of colors, and 

 is much used in cheaper forms of jewelry. The source is South 

 Africa. 



LIST OF SPECIMENS. 

 UNION OF SOUTH AFRICA (GRIQU ALAND WEST). 



Necklace of 56 round beads; brown; 7 to 4 mm. diameter. Bequest, William 



H. Forwood No. 1547 



Cabochon, elliptical girdle; light brown and white; 64.5 carats; 44 by 33 by 5 



mm. Gift of George F. Kunz No. 1453 



Cabochon, circular girdle; brown; two gems, 17.57 and 17. 37 carats; 17 by 8, 



20 by 5 mm. (fig. 7, pi. 7) "...No. 1455 



Cabochon, elliptical girdle; brown; two gems, 14.86 and 14.42 carats; 24 by 



17 by 5 mm. Isaac Lea collection No. 1454 



Cabochon, circular girdle; green; 12.5 carats; 17 by 6 mm No. 1456 



