Minerals

Question 1

Yellow Brown in colour
White to pale yellow streak
Resinous lustre

Answer 1

Spahlerite

Question 2

Colourless to white, yellow, blue or red
3 Cleavage planes at 90°
Less hard than glass

Answer 2

Sylvite

Question 3

Non metallic
Harder than Glass
2 Cleavage Planes
White, Blue-Grey, Black

Answer 3

Plagioclase Feldspar

Question 4

Red-Brown in colour
Red-Brown streak
Dull, non metallic lustre

Answer 4

Hematite

Question 5

Conchoidal Fracture
Vitreous Lustre
Harder than glass
Poor cleavage

Answer 5

Quartz

Question 6

White to grey to pale green
Less hard than glass
1 Plane of cleavage

Answer 6

Talc

Question 7

Colourless to light brown
Breaks into thin sheets
Non metallic
Less hard than glass

Answer 7

Muscovite

Question 8

Metallic Lustre
Yellow to dark brown colour
Yellow-brown to dark-brown streak
Poor cleavage

Answer 8

Sphalerite

Question 9

Colourless to white in colour
Less hard than glass
3 Planes of cleavage
Non-Metallic lustre

Answer 9

Gypsum

Question 10

Black in colour
Harder than glass
Poor cleavage
Metallic lustre

Answer 10

Magnetite

Question 11

Red-brown to brown
Conchoidal fracture
Non metallic lustre
Harder than glass
Poor cleavage

Answer 11

Garnet

Question 12

Non-Metallic
Less hard than glass
Poor Cleavage
Yellow-brown streak
Earthy lustre

Answer 12

Limonite

Question 13

Tan-Pink, White, Green, black
Non metallic lustre
2 planes of cleavage at 90°

Answer 13

Potassium Feldspar

Question 14

Colourless to white in colour
3 Planes at 90° 
Less hard than glass
Non metallic lustre
Cubic habit

Answer 14

Halite

Question 15

Colourless, White, yellow
Non metallic

3 Cleavage planes at 60 or 120

Answer 15

Calcite

Question 16

Brass-Yellow in colour
Poor cleavage
Cubic habit
Green or brown black streak

Answer 16

Pyrite

Question 17

Brass-Yellow 
Greenish black streak
Non metallic
Softer than glass 
Poor cleavage

Answer 17

Chalcopyrite

Question 18

Brown to black in colour
Sheet cleavage
Softer than glass
Non metallic

Answer 18

Biotite

Question 19

Metallic lustre
Yellow-brown to dark brown
Yellow brown streak
Softer than glass
Poor cleavage

Answer 19

Limonite

Question 20

Metallic lustre
Clear cleavage 3 planes at 90°
Less hard than glass

Answer 20

Galena

Question 21

Steel gray to black in colour
Metallic
Poor cleavage
Red-Brown streak

Answer 21

Hematite

Question 22

Black to greenish black in colour
2 planes of cleavage at 60 and 120
Harder than glass
Non metallic

Answer 22

Amphibole

Question 23

Pale yellow to olive green
Glassy grains
Non metallic lustre
Poor cleavage

Answer 23

Olivine

Question 24

Non metallic
Poor cleavage
Conchoidal fracture
Dull lustre

Answer 24

Cryptocrystalline quartz

Question 25

Black to greenish black in colour

2 planes at 90°

Answer 25

Pyroxene