214 
: .internally, with an adamantine lustre; is 
found in large and coarse granular distinct 
concretions, is usually translucent, semihard, 
brittle, easily frangible, and heavy. It phos- 
phoresces when rubbed in the dark ; occurs 
most frequently in transitive mountains in 
Bohemia, and other parts of Germany. 
Second species. Calamine. 
The general colour is yellowish-grey, which 
•passes into other neighbouring shades ; it 
•occurs massive, disseminated, cellular, cor- 
roded, &c. and chrystallized in tables, cubes, 
pyramids, and prisms. Externally the chrys- 
taU are splendent and shining ; internally, 
between shining and glimmering. It is usu- 
ally found in small and line granular distinct 
concretions, is semihard, ‘not very brittle, 
rather difficultly frangible, and heavy ; and 
is produced in beds in a tloetz limestone for- 
imition, accompanied with iron-ochre, lead- 
glance, c kc. It is met with in ail the mine 
counties of England and Scotland, in Ger- 
many, and other parts of the continent ; and 
when purified and roasted, is used for the 
fabrication of brass, which is a compound of 
.zinc and' copper. 
Eleventh Genus. Antimony. 
First species. A alive antimony. 
The colour is perfect tin-white: it occurs 
massive, disseminated, reniform, and probably 
■chrystallized; in the fresh fracture it is splen- 
dent, and has a metallic lustre. It is found 
usually in coarse, small, and fine granular 
distinct concretions, is soft, sectile, easily 
-frangible, and heavy in a low degree. Jt is 
roduced in veins in Dauphiny and in the 
larz, and disseminated in calx-spar in West- 
■ermanriland, in Sweden ; but is a rare mine- 
ral. 
Second species. Grey antimony ore. 
Compact grey antimony-ore is usually of 
a light lead-grey colour, occurs massive,' dis- 
-seminated, and occasionally in membranes ; 
internally is shining and glistening with a 
metallic lustre, is soft, not very heavy, easily 
frangible, soils, and becomes more shining in 
the streak. It is found in Sweden and some 
other countries, but is the rarest sub-species. 
Third species. Black antimony ore. 
Is of an iron-black colour, occurs only 
chrystallized in rectangular four-sided tables, 
is internally shining with a metallic lustre ; 
is soft, rather sectile, and heavy. In Corn- 
wall it is found of peculiar beauty. 
Fourth species. Red antimony-ore. 
Its colour is cherry-red; it occurs massive, 
•often in membranes, but most frequently in 
•delicate capillary chrystals ; both externally 
and internally it is shining, and has an ada- 
mantine lustre. It is found in coarse, small, 
and longish granular distinct concretions, is 
opaque, not very" brittle, and easily frangible; 
But is a very rare species. 
Fifth species. White antimony ore. 
It passes in colour from snow-white to se- 
veral neighbouring shades ; occurs massive 
and in membranes occasionally, but most 
commonly chrystallized in rectangular four- 
sided tables, cubes, and acicular and capil- 
lary chrystals. It is found in coarse and 
small granular distinct concretions, is trans- 
lucent, soft, rather sectile and heavy. Before 
the blowpipe, it becomes wholly volatilized. 
MINERALOGY. 
It is found in veins in Bohemia, Hungarv, 
and Saxony. J 
Sixth species. Aniimony-oclire. 
The colour is a straw-yellow, of various 
degrees of intensity ; it seldom occurs mas- 
sive and disseminated, but usually as a coat- 
ing on chrystals of grey antimony ore. It is 
dull, soft, not very brittle, nor 'particularly 
heavy. It is found always in veins, in diffe- 
rent parts of Germany, and is evidently 
found by the decomposition of grey anti- 
mony ore. 
Twelfth Genus. Cobalt. 
First species. While cobalt ore. 
When fresh fractured the colour is usually 
tin-white ; it occurs massive, disseminated, 
r<.c. and also chrystallized in cubes and 
double four-sided pyramids. It is found in 
coarse, small, and line granular distinct con- 
cretions; is semihard, brittle, not very diffi- 
cultly frangible, and heavy. It easily melts 
befoi e the blowpipe, emits a strong arsenical 
smell, and yields a white metallic globule. 
It usually occurs in beds in primitive moun- 
tains, and is found in Sweden, Norway, and 
Silesia. 
Second species. Grey cohalt ore. 
On the fresh fracture its colour is light steel- 
grey inclining to white, but it becomes tar- 
nished by exposure; it occurs only massive, 
disseminated, tubiform and specular ; inter- 
nally it is glimmering or glistening with a 
metallic lustre, is tound in thick anti curved 
lamellar distinct concretions, and is pro- 
duced in Cornwall, Norway, and various 
other countries. 
r Third species. Cobalt glance. 
rhe colour is <1 silver-white, slightly inclin- 
ingto reddish : it is commonly massive and 
disseminated, sometimes chrystallized in dif- 
ferent forms ; is externally splendent, inter- 
nally between shining and glistening, and has 
a metallic lustre. It is semihard, brittle, 
not very easily frangible; and when struck 
with steel, emits an arsenical smell. It is 
found in veins in various formations, in the 
different mine countries of the continent of 
Europe; and from it the greatest part of the 
cobalt in commerce is obtained, which is 
highly useful in the manufacture of glass, and 
as a paint. 
Fourth species. Black cohalt ore. ' 
Eartln black cobalt ore is of an intermedi- 
ate coloui between brownish and blueish- 
black, is composed of dull, dusky particles, 
which soil a little, usually cohering, streak 
shining, and very light. 
dfth species. Frozen cohalt ochre 
Is of a liver-brown colour, passing some- 
times into other neighbouring shades; it oc- 
ems massive and disseminated, is internally 
dull, soft, sectile, easily frangible, and light ; 
and appears to be peculiar to the fioetz 
mountains in some parts of Germany and 
Spain. 
Sixth species. Yellow cohalt ochre 
Is usually ol a dirty straw-yellow, occurs 
massive, frequently much bursten and cor- 
roded ; it is internally dull, streak shining, 
soft, and rather friable, sectile, easilv fran- 
gible, and light. It is the rarest species of 
cobalt ore, but most valued on account of 
its purity. 
, Seventh species. Red cobalt ochre. 
Cobalt crust is of a peach blossom-red co- 
ll 
lour, of different degrees of intensity, occurs 
most frequently in velvety drusy coatings, 
and disseminated, is feebly glimmering, bor- 
dering on dull, scarcely soils, has a shining 
streak, and is very soft and light. 
Thirteenth Genus. Nickel . 
First species. Copper nickel 
Is of a red copper-colour of different de~ 
grees of intensity ; it occurs usually massive 
and disseminated, is internally glistening, and 
has a metallic lustre. It is usually unsepa- 
rated ; sometimes, however, it is’ found in 
coarse and small granular distinct concre- 
tions, is semihard in a high degree, brittle, 
not very easily frangible, and heavy. Before 
the blowpipe it emits an arsenical smell and 
odour, and afterwards melts, though with 
difficulty. It is found in Cornwall, Norway, 
and many other countries, and is nearly al- 
lied to cobalt. 
Second species. Nickel ochre 
Is of an apple-green colour, occurs always 
as a coating or efflorescence, is composed of 
dull dusty particles, loose, or little cohering, 
feels meagre, and is light. It is found in the 
same situations with the preceding species. 
It is not certain that native nickel lias yet 
been discovered, though it is mentioned by 
some mineralogists. 
Fourteenth Genus. Manganese, 
l'irst species. Grey manganese ore. 
Radiated grey manganese ore is of a dark 
steel-grey colour, occurs massive, dissemi- 
nated, and chrystallized in prisms of different 
varieties. It is found in coarse, large, and 
small granular distinct concretions ; soils 
strongly when rubbed, is soft, brittle, rather 
difficultly frangible, and not particularly 
heavy. It is produced in several counties 
of England and Scotland, and in different 
parts of Germany. 
Second species. Black manganese ore 
Is of an intermediate colour between 
brownish-black and dark-greyish black, oc- 
curs massive, disseminated, and in octahedral 
chrystals. It is found in small and fine gra- 
nular concretions ; is opaque, semihard, 
brittle, and heavy ; but is a rare mineral, 
and hitheito found only in a few places of 
Germany and Spain. 
Third species. Red manganese ore 
Ts of a fight rose-red colour, occurs massive 
and disseminated, is internally dull, trans- 
lucent in a slight degree, hard, brittle, easily 
frangible, and heavy. It is found in veins in 
Norway, France, and some other countries. 
Fifteenth Genus. JMnljbdena. 
First species. Molybdena. 
Its colour is a fresh burning lead-grey ; it 
occurs usually mass.ve and disseminated, 
but also chrystallized in six-sided tables, and 
short six-sided prisms ; internally it is splen- 
dent, the fracture perfectly foliated, and is 
tound in large and coarse granular distinct 
concretions. It soils a little, is very soft, 
easily frangible, its thin leaves common flexi- 
ble, sectile, feels greasy, and is heavy. It is 
one of the oldest of metals, and occurs only 
in primitive mountains, disseminated, or in 
veins; and is produced in Norway, Sweden, 
Bohemia, and other countries. 
