W. F. Fontaine—Minerals in Amelia County, Va. 333 
Some masses are formed of the yellowish feldspar 
and beryl so closely consolidated, that they seem to shade off 
into each other. In the quartz, however, the beryl crystals are 
tals, half a centimeter thick and under occur, that have a good 
luster, but not a deep color. 
ee a 
Crystalline masses that shatter easily into small fragments. 
nly a few particles show good cleavage. The mineral is usu- 
ally found occupying the irregular angular spaces left between 
m 
show a very deep, dark green color. The fluorite is remarka- 
ble for the great beauty and brilliancy of the phosphorescent 
light that it gives out at quite low temperatures. The light is 
rich bluish green in color. Aiter decrepitation it no longer 
gives out light. 
Columbite-—This mineral oceurs quite commonly, and it is 
more abundant in pit No. 2 than in pit No. 1. It is found 
quite often in erystals, some of them being of large size. They 
are, however very easily broken, and can almost never be 
centimeters, width 114 centimeters and thickness 11 centime- 
ters. It appears to be a mass formed by the aggregation of 
Crystals that have a flat shape from the predominance of the 
% faces. All of the masses of columbite found here are friable 
and easily break up into angular fragments. ; 
variety of columbite oceurs here rather rarely, that differs 
* A somewhat similar mineral had been previously found at Branchville, Conn., 
_ and analyzed by Comstock. 
