490 Scientific Intelligence. 
forty feet square yielding emeralds, while still others have 
afforded quartz, rutile, monazite, mica ‘and other species. So far 
as the explorations have been carried, the pockets have been in 
a crumbling condition and the crystals have been found detached, 
lying in the bottom of the cavities. As the work is carried down 
deeper it is to be expected that the rock will increase in firmness. 
The largest cavity yet discovered had a depth of sixteen feet, and 
was three feet wide and’ seven in length. ‘The surface walls were 
thickly studded with large crystals of quartz, some of twenty-five 
pounds in weight, and with them nine fine emeralds. Their form 
was that of a twelve-sided prism (J and 7-2), with basal planes, 
all well polished. The largest crystal had a er of eight and 
one-half inches and an average diameter of one inch. e others 
varied in length from two to six inches. Most of the caval 
found are vertically deeply striated or cle and are transpar- 
ent, though not free from flaws. In so of the crystals the 
color near the surface is the deepest and tha core is nearly color- 
less. The North Carolina emeralds do not quite equal in color 
those from Muso, New Granada, but are nevertheless very beau- 
tiful and will bear comparison with those from other known 
ee 
8. Brief notices of some — described minerals, (Con- 
tinued from page 15 5.) Inesrre.—A white friable mineral with a 
bitter, astringent taste, pails. soluble in an water. An anal- 
sis affo rded Dr. Iles—SO, 3 35°85, MnO 23°18, FeO 4°55, ZnO 5°63 
30°18= 99°39, corresponding approximately to Mn(Fe, ra 
a) at4aq. Occurs with pyrite and sphalerite forming a band tw 
to eight inches in width; locality, Hall Valley, Park Co., Colo- 
rado. Named after re 1. W. Mes, of Leadville. — Mining 
Index, Leadville, a 5, 1881. 
SEMSEYI efly ented by odie as as a ae con- 
taining lead, ant ase. and sulphur, occurring in gra stals, 
and resembling ce cag Found with dinphorke. ephrite 
and pyrite at Felsébanya.— ~Ungarisehe Bind April, 1 
both in habit and angles, H.=6. G.=5-7. Luster metallic to 
submetallic. Color, black to blackish-brown. Translucent in 
thin splinters. Fracture pn pega. An analysis by C. W. 
Blomstrand gave gate SnO, 0°16, SiO, 2°51, ZrO, 1°97, 
ThO, 2°37, UO, 16: 3 sO. eee Y,0, 7-10, PbO 2°40, FeO 3°38, 
MnO 0°20, CiO sab. MO i KG che, Na,O 0°32, Al,O, 0°28, 
H,O 8-19 =99, 51, "The formula deduced is R,Cb b,0, +24 aq, 
which makes the mineral related in compos osition to ate 
ape in a pegmatite vein at Annerod, near Moss, Norway. 
Described by W. ©. Brégger.— Geol. For. i. Stockholm Fire 
hasdk: v, 354, 1881. 
ZANCALLUMINITE, —Found in er small thin hexagonal crys- 
tals; optically, uniaxial negativ Color white, or slightly 
tinted with blue. An analysis nee Damour gave SO, 12°94, 
ALO, 25°48, ZnO 34°69, CuO 1°85, H,O 25°04=100. From the 
