he | ee 
see 
314 F, A. Genth—Contributions to Mineralogy. 
Requires Te. 
RVers 4:08 2°42 6°50 p. c. of true hessite. 
Se abana chars 0°72 0°45 117 “ altaite. 
Mikel. 20°98 68°27 89°25 “ melonite 
Tellurium .... 73°43 2°29 “ nat. tellurium.(?) 
99°21 71°14 
The nickel from all my analyses contained just enough cobalt 
to color a borax bead very slightly blue. 
From this analysis as well as from the two analyses of hessite 
given above, the formula of the melonite appears to be Ni, Te,. 
Although the hexagonal form would better agree with the for- 
mula NiTe and bring the melonite into the same group with 
millerite, pyrrhotine, greenockite, etc., it is not very probable 
that it is a mixture of native tellurium and NiTe, because it 
would have contained about one third of native tellurium, e 
material for analysis, however, strongly magnified showed dis- 
tinctly a small quantity of the dark colored hessite, and every 
other particle showed the reddish hue, but not the slightest ad- 
mixture of a greyish white mineral could be observed. 
The composition of melonite, corresponding with Ni,Te, 
would be: 
2Ni oes 89 = 23°51 
fi ee re 192 76°49 
251 100-00 
e. Calaverite, a new mineral, AuTe,.—I have only observed 
it once, associated with petzite, on a specimen from the Stanis- 
us Mine. 
Massive, without crystalline structure. Soft. H. below 3. 
_ Brittle. Luster metallic. Color bronze yellow. Streak yel- 
lowish gray. Fracture uneven, inclining to subconchoidal. 
-B. on charcoal burns with a bluish green flame and yields 
globules of gold of a high yellow color. Nitric acid darkens it 
and separates metallic gold ; aqua regia dissolves it with the 
Separation of a minute quantity of chlorid of silver. ben 
a3 ) 
material for the analyses when strongly PE 
be perfectly pure. In II, 1-45 pr. ct. of quartz were deducted. 
te IL; 
40°70 40°92 
eka sd weet. 3°52 3°08 
“SS _ 55°89 56-00* 
. 100°11 100-00 
frequently mixed with the calaverite is 
era 1 for em PP d perfectly 
