|
Mineral
|
Power |
Color |
Description |
|
actinolite
|
|
|
a variety of amphibole, occurring in
greenish bladed crystals or in masses
|
|
albite
|
|
white |
the sodium end member of the plagioclase
feldspar group, light-colored and found in alkali rocks
|
|
amphibolite
|
ambiguity |
|
a metamorphic rock composed basically of
an amphibole, usually hornblende
|
|
andesite
|
|
|
a volcanic rock composed of essentially of
plagioclase feldspar, resembling trachyte in appearance
|
|
anhydrite
|
dehydration |
|
a mineral, calcium sulfate, usually
occurring in whitish or slightly colored masses
|
|
arsenolite
|
|
|
a mineral, arsenic trioxide, occurring
usually as a white incrustation on arsenical ores |
|
arsenopyrite
|
|
|
a common mineral, iron arsenic sulfide,
occurring in silver-white to steel-gray crystals or
masses: an ore of arsenic |
|
augite
|
|
|
a mineral, a silicate, chiefly of calcium,
magnesium, iron, and aluminum: a dark green to black
variety of monoclynic pyroxine, characteristic of basic
rocks |
|
autunite
|
|
|
a yellow mineral, a hydrous calcium uranium phosphate,
occurring in crystals as nearly square tablets: a minor
ore or uranium; lime uranite |
|
biotite
|
|
|
a very common mineral of the mica group, occurring in
dark black, brown, or green sheets and scales: an
important constituent of igneous rocks |
|
cassiterite
|
|
|
a common mineral, tin dioxide: the principal ore of tin |
|
celestite
|
sky |
|
a white to pale-blue mineral, strontium sulfate,
occurring in tabular crystals, the principal ore of
strontium |
|
cementite
|
|
|
a carbide found as a constituent of steel and cast iron,
sometimes having part of its iron replaced by other
metals, as manganese |
|
cerargyrite
|
|
|
a very soft mineral, silver chloride, used as an ore of
silver; horn silver |
|
cerite
|
|
|
a rare mineral, hydrous silicate of cerium, occurring in
brownish masses: a minor ore of the rare earths |
|
cerussite
|
|
|
a mineral, lead carbonate, found in masses or in white
crystals: an important ore of lead |
|
chabazite
|
|
|
a zeolite mineral, essentially a hydrated sodium calcium
aluminum silicate, occurring usually in red to colorless
rhombohedral crystals |
|
chromite
|
color |
|
a cubic mineral, ferrous chromate, usually having a
considerable amount of the ferrous iron and aluminum
replaced by magnesium, and some of the chromium by ferric
iron |
|
cordierite
|
|
|
a strongly dichroic blue mineral consisting of a
silicite of magnesium, aluminum, and iron |
|
danaite
|
|
|
a variety of arsenopyrite having cobalt in place of some
of the iron |
|
danburite
|
|
|
a rare mineral, calcium borosilicate, occurring in
pegmatite in yellow or colorless crystals resembling topaz |
|
embolite
|
|
|
a mineral, chloride and bromide of silver, used as a
minor source of silver |
|
fluorite
|
|
|
a common mineral, calcium fluoride, occuring in green,
blue, purple, yellow, or colorless crystals, usually in
cubes: the principal source of fluorine, used also as a
flux in metallurgy and for ornament |
|
granite
|
|
|
a granular igneous rock composed chiefly of orthoclase
and albite feldspars and of quartz, usually with one or
more other minerals, as mica, hornblende, or augite |
|
granitite
|
|
|
a granite rich in biotite |
|
granulite
|
|
|
a metamorphic rock composed of granular minerals of
uniform size, as quatz, feldspar, or pyrosene, and showing
a definite banding |
|
grossularite
|
|
|
a mineral, calcium aluminum garnet, occurring in
gray-white pinkish crystal |
|
hematite
|
blood |
|
a very common mineral, iron oxide, occurring in steel
gray to black crystals and in red earthy masses: the
principle ore of iron |
|
iolite
|
|
violet |
cordierite |
|
jadeite
|
|
|
a mineral, essentially sodium aluminum silicate,
occurring in tough masses, whitish to dark green |
| kermesite |
|
crimson |
a mineral, antimony oxysulfide, occurring usually in
tuft of red capillary crystal |
| magnetite |
magnetism |
|
a very common black iron oxide that is strongly
attracted by magnets: an important iron ore |
| malachite |
|
|
a green mineral, basic copper carbonate |
| marcasite |
|
|
a common mineral, chemically similar to pyrite;
white-iron pyrites |
| microlite |
|
|
a mineral, principally calcium pyrotantalate, usually
including niobium, flourine, and other impurities
occurring in cubic crystals |
| millerite |
|
|
a mineral, nickel sulfide, occurring in bronze-colored
slender crystals: a minor ore of nickel |
| mimetite |
|
|
a mineral, lead chloroarsenate, occurring in yellow to
brown prismatic crystals or globular masses: a minor ore
of lead |
| nephrite |
|
|
a mineral, a compact or fibrous variety of actinolite,
varying form whitish to dark green |
| pegmatite |
|
|
a graphic intergrowth of quartz and feldspar; graphic
granite |
| phacolite |
|
|
a colorless variety of chabazite |
| pyrite |
fire |
brass-yellow |
a very common brass-yellow mineral |
| syenite |
|
|
a granular igneous rock consisting chiefly of orthoclase
and oligoclase with hornblende, biotite, or augite |
| sylvite |
|
|
a common mineral, potassium chloride, colorless to
milky-white or red, occurring in crystals, usually cubes,
and masses with cubic cleavage, bitter in taste: the most
important source of potassium |
| tellurite |
|
|
a rare mineral, tellurium dioxide |
| torbanite |
|
|
a dark-brown oil shale containing a large amount of
carbonaceous matter |
| torbernite |
|
|
a mineral, hydrated copper uranium phosphate, occurring
in square tabular crystals of bright green color,: a minor
ore of uranium; copper uranite |
| trachyte |
|
|
a fine-grained igeneous rock consisting essentially of
alkali feldspar and one or more subordinate minerals, as
hornblende or mica: the volcanic equivelant of syenite |
| ulexite |
|
|
a mineral, hydrous sodium and calcium borate, occurring
in arid regions in the form of white acicular crystals |
| uralite |
|
|
hornblende formed by the hydrothermal alteration of
pyroxene |
| uraninite |
|
|
a mineral, probably originally uranium dioxide, but
altered by radioactive decay, and usually containing more
or less uranium trioxide, lead, radium, and helium,
occurring in several varieties, includinf pitchblende: the
most important ore of uranium |
| uranite |
|
|
any of the uranium phosphatesm as autunite or torbernite |
| vulpinite |
|
|
a variety of anhydrite, occurring at Vulpine, Italy, in
granular, scaly masses: used as an ornamental stone |
| vulsinite |
|
|
a trachytic rock, composed chiefly of andesine, sanidine,
mica, and hornblende |
| xalostockite |
|
|
a pale variety of grossularite occurring in white marble
from Xalostec, Mexico |
| zinkenite |
|
|
a steel-gray mineral with metallic luster, lead antimony
sulfide |
| zoisite |
|
|
a mineral, hydrous calcium aluminum silicate: a variety
of epidote nearly free of iron |
