GSC 206 QUIZ 1 SILICATE MINERALS

Kyanite

Al_2SiO_5

Hardness: 4

No Streak

Luster: glossy

Crystal system: Triclinic bladed

Andualiste

Al_2SiO_5

Hardens: 7-7.5

No streak

Dark in color but glassy

Crystal System: Prismatic/orthorhombic

Reddish-brown, orange, black

Hyperstene

(Mg, Fe)_2Si_2O_6

Hardness:5-6

No streak

Lack luster and a little shiny

Crystal system: prismatic

Looks like wood

Enstatite

(Mg, Fe)_2 Si_2 O_6

Hardness: 6-7

No streak Lack

Glassy

Orthorhombic

Grey w/ Horst and log crystals

Olivine

(Mg, Fe)_2 SiO_4

Hardness: 7

No streak

Glassy

Orthorhombic

Green and granny looking (boogerish)

Iron- patch

Beryl

Al_2 Be_3 Si_6 O_18

Hardness; 6-7

No streak Lack

Glossy

Hexagonal

Pretty blue

Diopside

CaMgSi_2 O_6

Hardness: 4-5

No streak

Prismatic

Spodumeme

LiAlSi_2 O_6

Hardness 6-7

“Greasy” prglittery

Mono line/primatc

Looks like a pretty highlighter shade (makeup)

Epidote

(Ca_2 Al_2 (Fe,Al)) O OHSiO_4 (Si_2 O_7)

Hardness 6-7

No streak

Dull

Fibrous/monoclinci

Spiky looking w/ fine crystals

Aguite

(Ca, Mg, Fe²^+, Al)(Si,Al)_2 O_6

Hardness 5-6

No streak Lack

Glossy

Monoclinc / prismatic

Looks like coal

Tourmaline

Na(Mg, Fe, LI , Al)_3 [Si_6 O_18] (BO_3)_3 (O,OH,F)

IMPASTA AH ROCK Hardness 7

No streak Lack luster

Shiny and slightly metallic

Ragonal / prismatic

Some pieces look green, gray/purple, or appears green

Staurolite

Fe_2 Al_9 O_6 (SiO_4)_4 (OH)_2

Hardness 5-6

No streak Lack

Lac luster

Orthorhombic / hexagonal;

Looks like a 2000s cross

Reddish-brown

Garnet

(Mg, Fe, Ca)_3 Al_2 (SiO_4)_3

Hardness 7

No streak

Glassy

Cubic/isometric & dodecahedral/ trapezohedral

Looks like beef jerky

Deep red

Crystals appear brown