CATALOGUE OF GEMS. 



491 



emerald imliicU>s tho rich green colored kinds only. It is u liighh^ 

 prized gem wlien of :i l)right emerald green color, clear, and free 

 from flaws. 



The aquamarine includes those beryls showing clear shades of sky 

 blue and sea green. Goshenite is a white or colorless variety from 

 Goshen, ^Massachusetts. Davidsonite is a greenish 3'ellow beryl from 

 near Aberdeen, Scotland. Other varieties are: Aeroides, pale sk}' 

 l)hu'; hyacinthozontiv^. cloar sapphire blue; amethiste basaltine, pale 



Fig. 4. 



EMERALD CRYSTAL. 



Stony Point, Alexander County, North Carolina. 

 Weight, 8J ounces. 



Spti-iinen No. 83730, U.S.N. M. 



violet or reddish; chrysolithus, pale yellowish green; golden beryl, 

 clear bright yellow, and chr3^soberyllus, greenish yellow to honey or 

 wine yellow. All the varieties are somewhat brittle and contain in 

 100 parts: Silica, 60.8; alumina, 19.1; glucina, 11.1. 



BERYLLONITE. 



BeryMonite was first found loo.sc among tiie disintegrated material 

 of a gianite vein at Stoneham, Maine, in 1880, and this is still the only 

 locality' \nown. It occurs in short prismatic to tabular and highl}'^ 



