02 Chemical Examination of Gokumiie. 



ral was not Loboite. I have called li gokumite from the name 

 of the place where it was found. 



The color is light yellowish-green. When examined with 

 a glass, it appears to be composed of a congeries of irregular 

 crystals, which bear a nearer resemblance to octahedrons, 

 than to any other figure. The pyramids of the octahedrons 

 are very low, and tlie faces are frequently striated parallel to 

 the base. 



The crystals are foliated. 



Exceedingly fr;mgible. Very small crystals, apparently of 

 'topaz, sparingly scattered through the mineral. 



Opaque, or only slightly translucent on the edges. 



Scratched by the knife. 



Specific gravity 3-744. 



Its constituents were, 



Silica, ----___ 35*680 



Lime, 25-7 i8 



Protoxide of iron, - - - _ _ 84*460 



Alumina, ------- 1-400 



Water, --_-___ 0-600 



97-888 



It is, therefore, composed of, 



1 atom silicate of lime, _ _ _ _ 5.5 



1 atom silicate of iron, _ - _ _ 6.5 



12-0 



My specific gravity of lioboite is only 3-543. It is harder 

 than gokumite, and has a darker color. Its crystalinc form is 

 a four-sided prism, seemingly the same as that of idocrase. 

 Its constituents, according to the analysis of Berzelius, are 

 as follows, 



