<a 
Mineralogy and Geology. 119 
reous spar vein, and is doubtless derived from the lime of the Spar and 
the + ha and aluminous ingredients of the conglomerate and sand- 
stone. Datholite and prehnite in many of the veins contain points of 
metallic copper ; and this fact is supposed to prove a rapid production 
these minerals, instead of slow infiltration, on the ground that if it 
had been slow, the copper would have been oxydated. 
2. Damourite in the United States; by E. Toucan (Bost. 
Nat. Hist. Proceedings, p. 107, March, 1846.)—Damourite, according 
to Mr. Teschemacher, occurs among the minerals of Chesterfield, Mass., 
and also with the kyanite of Leiperville, Penn. It is met with as a 
yellow amorphous incrustation. It gives off water before the blowpipe, 
becomes milk-white, and melis in the strongest heat at the edges to a 
white enamel. . 
3. Diamonds in. North Carolina.—We have seen a beautiful dia- 
mond of fine water, weighing about four grains, taken from a gold 
washing in Rutherford county, N. C., and understand that others have 
been found in the same state. 
_ 4; Martinsite, a new Mineral; by M. Karsten, (L’Institut, No. 
638, March 25, p. 101.)—The name Martinsite, in honor of Capt. 
Martin of Halle, has been given to a saline mineral from the salines of 
Stassfurth, composed essentially of 9°02 parts of sulphate of magnesia, 
and 90-98 of chloride of sodium. This corresponds to 10 parts by 
weight of common salt to 1 of sulphate of magnesia. 
9. Transparent Anadalusites from Brazil; by M. HatincEr, (Bull. 
Soc. Geol. de Franu, 2d ser., i, 20.) —These crystals are green when 
viewed perpendicular to the faces, and hyacinth-red viewed parallel 
with the line which unites the longer basal edges. 
6. Diamonds of the Ural; (Murchison’s Russia.)—Mr. Murchison 
Slates that he saw upwards of forty specimens of diamonds, in the cabi- 
net of Prince Butera, which were detected in the detritus upon the banks 
of the Adolfski rivulet, when the alluvium was there worked for gold. 
The workings for gold having been discontinued in this place, no more 
diamonds have been found. Baron Humboldt, before his visit to Siberia, 
had foretold that diamonds would be found in the Ural, as they had in 
other countries which contain platinum and palladium; while he was 
there the discovery at Chrestovodsvisgensk was made, and since then 
they have been found at three other places in the Ural chain. <A quartz- 
Ose micaceous shist, identical with the itacolumite of the Brazils, oc- 
curs in a portion of the chain adjacent to those mines where the dia- 
monds have been found, as well as in other parts of the Ural. A Bra- 
lian specimen of itacolumite in the Imperial museum of the school 
of mines contains two diamonds. M. Claussen says that in the province 
of Mina’s Geraes, (Brazil,) powerful and slightly inclined beds of soft 
