pic |
|
Calcite; fizzes in acid; white, yellow, or colorless; non-silicate
|
| |
pic |
|
Halite; salty taste; cubic; colorless/white; non-silicate
|
| |
pic |
|
Gypsum; can scratch with your fingernail; white/transparent; non-silicate
|
| |
pic |
|
Graphite; smudges fingers; like pencil lead; black; non-silicate
|
| |
pic |
|
Hematite; red-color; non-silicate
|
| |
pic |
|
Magnetite; strongly magnetic; black; non-silicate
|
| |
pic |
|
Limonite; red streak; yellow, brown, black color; non-silicate
|
| |
pic |
|
Dolomite; fizzes when powdered; pink, tan color; non-silicate
|
| |
pic |
|
Fluorite; various colors; can come in green, white, yellow, or purple; non-silicate
|
| |
pic |
|
Galena; very high specific gravity (7.6); cubic; lead grey streak; shiny black color; non-silicate
|
| |
pic |
|
Chalcopyrite; often cubic; green-brown; pale brass yellow color; non-silicate
|
| |
pic |
|
Sphalerite; powdered streak smells like rotten eggs; yellow brown to black color; non-silicate
|
| |
pic |
|
Pyrite; tarnished to purple; shinier; brass yellow color; non-silicate; fake gold!!!
|
| |
pic |
|
Biotite; black sheets; brown to black color; silicate
|
| |
pic |
|
Muscovite; clear sheets; colorless/light yellow color; silicate
|
| |
pic |
|
olivine; very green; shades of green; silicate
|
| |
pic |
|
kyanite; bladed crystals; blue, white, gray, green colors; silicate
|
| |
pic |
|
Staurolite; twin crystals; x-shaped; red-brown or brownish-black color; silicate
|
| |
pic |
|
talc; soapy feel; green to white color; silicate
|
| |
pic |
|
quartz; conchoidal shaped; grey to grey black; silicate
|
| |
pic |
|
Garnet; 12-sided crystals white streak but red-brown color; silicate
|
| |
pic |
|
Plagioclase; cleavage striations; grey to blue grey color; silicate
|
| |
pic |
|
Orthoclase; pink flesh colored; silicate
|
| |
pic |
|
Hornblende; dark black, 50 degrees/ 124 degrees; black color; silicate
|
| |
pic
|
|
Pyroxene; black with white dots; 70 degrees two planes; black color; silicate
|
| |
pic
|
|
Kaolinite; chalky look; white color; silicate
|
| |
pic |
|
arkose sandstone; angular feldspar; grainy look; fragments are larger, grey to pink or light red; sedimentary
|
| |
pic |
|
dolostone; contains fossils; dark tan/brown due to iron; sedimentary
|
| |
pic |
|
bituminous coal; dark black; soft; brittle; leaves hands dirty; sedimentary
|
| |
pic |
|
rock gypsum; scratch with fingernail; color is white/pink/tan; sedimentary
|
| |
pic |
|
conglomerate; rounded; smooth pebbles embedded, large color range; sedimentary
|
| |
pic |
|
rock salt; feels greasy; color white to grey;sedimentary
|
| |
pic |
|
coquina; consists of ground up shell materials loosely cemented; sedimentary
|
| |
pic |
|
shale; minerals too small to be seen and cant be felt; black color; usually soft and reflected by thin laminae; sedimentary
|
| |
pic |
|
breccia; angular rock or mineral fragments of finer material; various shades of greys, greens, reds, browns; sedimentary
|
| |
pic |
|
micrite; minerals too small to see or feel; usually soft, color varies (tan brown grey); sedimentary
|
| |
pic |
|
chalk; consists of microscopic shells or planktonic organisms; earthy; soft; color usually white; sedimentary
|
| |
pic |
|
oolitic limestone; grains may be angular or rounded; fossils common; dirty/dark green, brown, grey; sedimentary
|
| |
pic |
|
chert; hard, breaks with conchoidal fracture; dense; color varies; smooth, white, dirty, very fine/small grains; sedimentary
|
| |
pic |
|
calcarenite; effervesces in HCl; contains fossils or small spherical sided grains; sedimentary
|
| |
pic |
|
quartz sandstone; primarily quartz grains; varies with other rocks included; angular or rounded; surface feels sandpapery; sedimentary
|
| |
pic |
|
greywacke sandstone; primarily rock and mineral fragments with clay; fossil fragments common; may show stratification; sedimentary
|
| |
pic |
|
peridotite; dark; green-gray (like olivine); igneous
|
| |
pic |
|
obsidian; light; red striations; dark color and glassy; igneous
|
| |
pic |
|
basalt; dark; deep black (like magnetite); igneous
|
| |
pic |
|
porphyritic andesite; intermediate; green, large white grains; small black grains; igneous
|
| |
pic |
|
pumice; light; (like orthoclase); white like sponge; igneous
|
| |
pic |
|
scoria; dark (magnetite color); black like sponge; igneous
|
| |
pic |
|
gabbro; dark (magnetite color); black/grey crystals; igneous
|
| |
pic |
|
rhyolite; light; light red with no visible grains (like orthoclase); igneous
|
| |
pic |
|
granite; light; quartz pieces; tan with black/white grains; igneous
|
| |
pic |
|
tuff; light; light tan; various color grains; igneous
|
| |
pic |
|
diorite; intermediate; black and white small grains; igneous
|
| |
