Geology Mineral Quiz

Olivine

olive green, yellow, usually opaque

Garnet

soccer ball, black w/ pink/yellow spots

Quartz

purple, prism, grey/orange

Orthoclase

himalayan salt lamp, pink/grey, 2 right angles

Plagioclase

white/grey color, 2 right angles

Calcite

rhombus, clear, reactes with hcl

Dolomite

rhombus, opaque, pink

Halite

cube, salty, clear

Sulfur

stinky, bright yellow

Fluorite

GREEN w/ white, toothpaste color

Gypsum

Breaks easily, looks like salt, book

Clay

Soft, white, chalky, breaks under fingernail

Talc

More olive green, feels soapy/greasy, uneven

Graphite

Slippery, shiny, messy, dark grey, pencil

Galena

Dark grey streaks on porcelain, metallic/shiny

Pyrite

Fools gold, brass yellow, pirate’s gold

Chalcopyrite

Red/reddish brown, brass yellow

Magnetite

Magnetic, dark grey, scratches glass

Hematite

Can be shiny or not, red/reddish brown

Limonite

Rusty brown, yellow brown

Sphalerite

Kinda metallic, dark grey/brown, stinky marks

Augite

Dark grey/black, angled 90 degrees, opaque

Hornblende

Opaque, black, pink/brown spots, heavy

Biotite

Black, thin sheets, plasticy

Chlorite

Light grey, grey, slightly shiny, white/green streak

Muscovite

Light colored, breaks off in sheets

Copper

Penny, tarnishes dark brown/green, thin, easy to bend