

OEES OF ZINC. 



0- 



The ores from two counties only have as yet been subjected to analy- 

 sis, \iz: those from Lawrence county and Marion county; [one from Inde- 

 pendence county, see "Appendix."] 



A-— ORES OF ZINC FROM LAWRENCE COUNTY. 



Ores, containing zinc, especially in the shape of carbonate of zinc, have 

 been found at numerous localities in this county. The richest diggings 

 are situated in the vicinity of Calamine, and at the time of our visit, the 

 deepest excavations had been made at the localities, designated, respec- 

 tively, as the Hoppe mine, Bath mine, and Koch mine. Specimens of the 

 ore taken from these three mines, were subjected to analysis. The ore 

 occurs in cavities (pockets and veins) in dolomite, and in most cases, is 

 found imbedded in a stiff, red, feruginous clay. Both, the dolomite and 

 he clay, contain small quantities of zinc, (compare analyses Nos. 32, 34 

 and 35.) In some cases, however, the ore is closely connected with the 

 dolomite, either adhering to its surface, or filling small cavities in the 

 rock, or traversing the dolomite in small veins, rarely more than a quarter 

 of an inch in diameter. 



A. — Ore from the Hoppe mine. 



By far the greater quantity of the ore found at this mine, is a massive, 

 amorphous, hydrous carbonate of zinc, of pale grayish-yellow color; 

 soft; breaks easily; powder of a pale cream color; small pieces dissolve 

 readily in dilute hydrochloric acid, with effervescence. The composition 

 of this mineral is given below, No. 1; the analysis may be considered to 



