Geology 300: Physical Geology

Geology 301: Physical Geology Lab

Geology 305: Earth Science

Geology 306: Earth Science lab

Samples: Minerals, Sedimentary, Igneous, Metamorphic

Instructor: Arthur Reed, P.G.

Mineral Samples for Geol 306 Exercise 1.2

All samples are approximately 1” – 3” in size

SG = Specific Gravity

NOTE: ALWAYS CLICK ON THE SAMPLE NUMBER UNDER THE PHOTO TO GET THE BEST/CORRECT VIEW OF THE MINERAL

SAMPLE 554

Hardness: 3.4 - 4

SG = 4.1 – 4.3

SAMPLE 557

Hardness: 2.5

SG = 7.4 – 7.6

SAMPLE 558

Cleavage good (although not apparent in this photo)

Hardness: 2

SG = 2.3

SAMPLE 562

This mineral comes in all colors

Hardness: 7

SG = 2.6 – 2.7

SAMPLE 589

Cleavage excellent in two direction at nearly 90° (although not apparent in this photo)

Hardness: 6

SG = 2.5 – 2.6

SAMPLE 608

Crystals are often in cubic form

Hardness: 6 – 6.5

SG = 4.9 – 5.2

SAMPLE 612

Crystal shape may also be cubic

Hardness: 4

SG = 3 – 3.3

SAMPLE 617

Often greenish color

Hardness: 7

SG = 3.3 – 3.4

SAMPLE 634

Hardness: 2.5 - 3

SG = 8.8 – 9.0

SAMPLE 635

Fracture may be conchoidal

Hardness: 5

SG = 3.1 – 3.4

SAMPLE 641

Fizzes in HCl

Hardness: 3.5 - 4

SG = 3.6 - 4