Minerals

Answer 1

Augite

Nonmetallic, dark-colored

Hardness: 5.5-6

Cleavage: two planes at nearly 90 degrees

Streak: White to gray

Answer 2

Biotite

Nonmetallic, dark colored

Hardness: 2.5-3

Cleavage: Perfect basal cleavage

Streak: White to gray

Answer 3

Cahalcopyrite

Metallic luster

Hardness: 3.5-4

Streak: Greenish black

Mined for copper

Answer 3

Chalcedony (chert/flint)

Nonmetallic, light-colored

Hardness: 7

Streak: White

Answer 4

Quartz (Crystal)

Nonmetallic, light-colored

Hardness: 7

Streak: White

Answer 5

Fluorite

Nonmetallic, light-colored

Hardness: 4

Cleavage: Perfect octahedral (4planes)

Streak: White

Allochromatic: occurs naturally in a variety of colors

Answer 6

Calcite

Nonmetallic, light colored

Hardness: 3

Cleavage: Perfect rhombohedral

Streak: White to gray

Reacts with HCl

Answer 7

Garnet

Nonmetallic, dark-colored

Hardness: 7-7.5

Streak: White or shade of the mineral color

Answer 8

Goethite (Limonite)

Nonmetallic, dark-colored

Hardness: 1

Streak: brownish yellow to orange yellow

Mined for Iron

Answer 9

Graphite

Metalic Luster

Hardness: 1

Cleavage: Perfect basal

Streak: Black, such as a pencil

Answer 10

Gypsum (With Cleavage)

Nonmetallic, light-colored

Hardness: 2

Streak: White

Answer 10

Halite

Nonmetallic, light-colored

Hardness: 2.5

Cleavage: Perfect cubic

Streak: White

Salt taste

Answer 11

Hematite

Nonmetallic, dark-colored

Hardness: 5-6

Streak: Red

“Soft Iron Ore”, Mined for iron

Answer 12

Galena

Metallic luster

Hardness: 2.5

Cleavage: Perfect cubic

Streak: Lead gray

Mined for lead

Answer 13

Hornblende

Nonmetallic, dark-colored

Hardness: 5-6

Cleavage: Two planes with intersections at 56 and 124 degrees

Streak: White to gray

Answer 15

Kaolinite

Nonmetallic, light-colored

Hardness: 2.0-2.5

Streak: White

Answer 16

Magnetite

Metalic Luster

Hardness: 5.5-6

Streak: Black

Strongly magnetic

Answer 17

Quartz (Milky)

Nonmetallic, light-colored

Hardness: 7

Streak: White

Answer 19

Muscovite

Nonmetallic, light colored

Hardness: 2.5-3.5

Cleavage: Perfect basal yielding thin flexible and elastic sheets

Streak: White

Answer 20

Orthoclase (K-Feldspar)

Nonmetallic, light-colored

Hardness: 6

Cleavage: two planes at nearly 90 degrees

Streak: White

Answer 20

Olivine

Hardness: 6.5-7

Streak: White to gray

Answer 22

Plagioclase

Nonmetallic, light-colored

Hardness: 6-6.5

Cleavage: Two planes at nearly 90 degrees and shows striations

Streak: White

Answer 23

Pyrite

Metalic Luster

Hardness: 6-6.5

Streak: Greenish or brownish black

Also known as fools gold

Answer 24

Quartz (Smoky)

Nonmetallic, light-colored

Hardness: 7

Streak: White

Question 25


Answer 25

Sphalerite Nonmetallic, dark-colored Hardness: 3.5-4 Cleavage: Perfect in six directions (dodecahedral) Streak: Brown to light yellow or white *Mined for zinc*

Question 26


Answer 26

Talc (With Cleavage) Nonmetallic, light-colored Hardness: 1 Cleavage: Perfect basal Streak: White