WARM UP What are the 5 properties of a mineral? 2.What are two different types of tests you can do on a mineral to see what mineral it is?

ROCKS AND MINERALS

MOH’S SCALE OF HARDNESS Moh’s Scale of Hardness was made by a man named Friedrich Moh. It measures to see how much a mineral can be scratched. It goes from talc to diamond.

TALC softest on Moh’s scale light to dark green, brown, white monoclinic or triclinic fractures in an uneven way Streak is white to pearl green its luster is pearly or wax-like can be used as talcum powder or baby powder.

GYPSUM number 2 on the scale of hardness colorless to white; may be yellow, tan, blue, pink, brown, reddish brown or gray due to impurities luster is vitreous to silky, pearly, or waxy streak is white prismatic can be used as drywall

CALCITE colorless or white, also gray, yellow, green conchoidal number 3 on the scale streak is white trigonal hexagon scalenohedral vitreous to pearly on cleavage surfaces

FLUORITE colorless, white, purple, blue, green, yellow, orange, red, pink, brown, bluish black; commonly zoned isometric subconchoidal to uneven vitreous number 4 on scale streak is white

APATITE transparent to translucent, usually green, less often colorless, yellow, blue to violet, pink, brown. hexagonal streak is white conchoidal to uneven

FELDSPAR pink, white, gray, brown vitreous streak is white is number 6 on the scale triclinic or monoclinic

QUARTZ from colorless to black, through various colors trigonal trapezohedral and hexagonal vitreous – waxy to dull when massive streak is white number 7 in scale

TOPAZ colorless (if no impurities), blue, brown, orange, gray, yellow, green, pink and reddish pink Orthorhombic vitreous streak is white number 8 on the scale

CORUNDUM colorless, gray, brown; pink to pigeon-blood-red, orange, yellow, green, blue to cornflower blue, violet; may be color zoned, asteriated mainly grey and brown trigonal number 9 on scale vitreous streak is white

DIAMOND!!!! typically yellow, brown or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple and red. octahedral hardest mineral no color streak the only thing that can scratch diamond is diamond admantine