|
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 |