ee ee ee ee. a a ee ee 
ELISHA MITCHELI, SCIENTIFIC SOCIETY. 79 
100 per cent, is given below together with the theoretical 
composition calculated for this formula. 
Found Theory for 
(MgFe)Si0,; Me : Fe=7:1 
teh sth. 5735 57°69 
Mee) ses 3914 8°65 
Brot nite i5'5h 33°66 
100°00 1L00°00 
The name bronzite is very appropriate to this Webster 
enstatite, for the luster is of a decided bronze-like char- 
acter throughout the entire mass and is undoubtedly not 
of a secondary origin, but is the natural luster of this 
mineral. A similiar bronzite, showing the same decided 
bronze-like luster has been found at the Buck Creek, 
(Cullakanee,) corundum mine in Clay county. 
HMERALD BERYL. 
Although the beryl is a very common accessory miner- 
al, in granite veins, especially those of a pegmatitic charac- 
ter, it is not common to find the deep emerald vreen va- 
riety. The earliest report of the emerald in North Car- 
olina is 1880, by W. IE. Hidden*® who deseribes the oc- 
currence in Sharpes Township, Alexaader Co. w cere it is 
found associated with the emerald green hiddenite. 
The occurence of the emerald in Mitchell Co. has been 
known since 1886, though but little work has been done 
to develope the locality and to estimate its economic 
value. Vhe mineral is found on the divide between 
Brush and Crabtree Creeks about four miles south of 
Spruce Pine, post office. 
The vein carrying the beryl is of a peematitic character 
consisting chiefly of quartz aud an atbite feldspar, with 
*Elisha Mitchel Scientific Society. 1880. 
