Color Testing Trivia Questions

Is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. Also, the ________is the flow of material from one rock type to another over geologic time

Naturally occurring compound or chemical element of atoms in a repetitive pattern

Most apparent property. Usually with metallic luster same color, but varied with non-metallic luster

Appearance of a mineral when light is reflected from its surface          Metallic: look like a metal, opaque, dull if exposed to air          Nonmetallic: Any color
Vitreous:Glass
Dull:Earthy appearance
Greasy: as if covered by oil

Resistance to scratching          Mohs Hardness: Fingernail, copper coin, glass,knife,plate

Color of mineral when powdered Helps identify metallic lusters because others have a light streak

•   Cleavage breaks or cleaves along parallel lines •                  Fractures break along random irregular suraces •                  Cleavage plains: 3 (90), 2, 1 *6-8 not common

Thin parallel grroves

White to dark grey; nonmetallic; 6 H;white streak; 2 cleavages (almost 90);          striations          Ca=gray to dark grey          Can be peacock blue in some light          Mafic  

   White to dark grey, nonmetallic; 6 H,white streak; 2 cleavages (almost 90);          striations          Na=Creamy, light          Intermediate

Pink,white,gray,green;Nonmetallic-vitreous luster; 6 H; white streak; 2 cleavages          no striations          Semi-parallel veinlets          Intermediate

Varies in color (smoky, rose, milky..); Nonmetallic- vitreous luster; 7 H; conchoidal fracture;streakless because of hardness          Felsic

Tastes like salt          Sedimentary rocks          Colorless to white; cubic cleavage; 2.5 H; nonmetallic; white streak

   Steel to dull red; Red to brown streak; 6 H; Fractured; metallic luster; flaky          Most sedimentary

   Micas          Black to brownish black; nonmetallic vitreous; 2.5-3 H; faint gray streak; perfect cleavage; flexible & elastic in thin sheets          Intermediate

Clear, white, faintly colored; nonmetallic-vitreous;3 perfect cleavages; white streak          reacts with dilute hydrochloric acid - Bubbles

Silvery gray;metallic;2.5 H;Gray streak; Cubic cleavage

Gray to black; Metallic, 2-2.5 H,Dark gray streak;one cleavage;greasy luster

Colorless,white;nonmetallic vitreous; 2-2.5 H; one perfect cleavage;white streak          Elastic in this sheets          Felsic

Clear, white, light; 2 H, nonmetallic- vitreous to pearly; one cleavage, white streak          Brittle sheets

Green to black; H 5; 2 imperfect cleavages (90)- hard to see; Nonmetallic-vitreous to dull; White streak          Not splintery-blocky          Mafic

Black; H 5-6;2 perfect cleavages (124 & 56) ; Nonmetallic- vitreous; white streak          Cleavages give splintery look          Intermediate

Dark grey to black; 6 H; metallic; black streak; fractured          Attracted to magnet, high specific gravity

Yellow to green, granular, conchoidal fracture, 6.5-7 H, ;unstreakable-as hard as streak plates          May break into green granules          Mafic

Brass-yellow; 6 H; Metallic; fractured; green to black streak          Fool's Gold