Mineralogy Fundamentals And Metallic Minerals Identification Practice Tests

Question 1

A mineral sample weighs 145 grams in air and 95 grams when fully submerged in water. Calculate the specific gravity of the mineral. Express your answer to two decimal places.

Accepted Answer

2.90

Question 2

A mineral displays a conchoidal fracture and has a hardness of 7 on the Mohs scale. Which of the following minerals is it most likely to be?

Accepted Answer

A. Quartz

Answer

B. Calcite

Answer

C. Gypsum

Answer

D. Talc

Question 3

Which of the following are examples of silicate minerals?

Answer

A. Quartz

Answer

B. Calcite

Answer

C. Garnet

Answer

D. Epidote

Question 4

Streak is generally a more reliable property than color for mineral identification because streak is less affected by impurities.

Accepted Answer

True

Answer

False

Question 5

A mineral sample has a metallic luster and is found to contain iron and sulfur. To which mineral class does it most likely belong?

Accepted Answer

B. Sulfides

Answer

A. Native Elements

Answer

C. Oxides

Answer

D. Carbonates

Question 6

A mineral sample is found to scratch a glass plate (hardness ~5.5) but is scratched by corundum (hardness 9). What is the possible range of hardness for this mineral according to the Mohs hardness scale?

Accepted Answer

5.5 < hardness < 9

Question 7

A mineral sample weighs 150 grams in air and 90 grams when submerged in water. Calculate the specific gravity of the mineral using the formula: Specific Gravity = Weight in Air / (Weight in Air - Weight in Water).

Accepted Answer

2.5

Question 8

A mineral displays perfect cleavage in one direction and conchoidal fracture in another. Which of the following best describes its breakage properties?

Accepted Answer

C. It has both cleavage and fracture.

Answer

A. It only exhibits cleavage.

Answer

B. It only exhibits fracture.

Answer

D. It exhibits parting.

Question 9

A mineral sample is tested for hardness using the Mohs scale. It scratches apatite but is scratched by orthoclase. What is the approximate hardness of the mineral?

Accepted Answer

B. 5.5

Answer

A. 4.5

Answer

C. 6.5

Answer

D. 7.5

Question 10

The streak of a mineral is always the same color as the mineral itself.

Accepted Answer

True

Answer

False

Question 11

Which of the following are examples of non-metallic luster?

Answer

A. Vitreous

Answer

B. Resinous

Answer

C. Metallic

Answer

D. Silky

Question 12

A crystal is classified as having three mutually perpendicular axes, all of which are of different lengths. To which crystal system does it belong?

Accepted Answer

Orthorhombic

Question 13

A mineral sample is observed to have a crystal habit that resembles a bunch of grapes. Which term best describes this habit?

Accepted Answer

C. Botryoidal

Answer

A. Acicular

Answer

B. Prismatic

Answer

D. Tabular

Question 14

A sample of an unknown mineral exhibits a brassy yellow color, metallic luster, and a hardness of 6-6.5. Which of the following minerals is the MOST likely candidate?

Accepted Answer

A. Pyrite

Answer

B. Galena

Answer

C. Chalcopyrite

Answer

D. Sphalerite

Question 15

Given a mineral sample with a chemical formula of Fe1-xS, metallic luster, bronze color, and magnetic properties, which mineral is it MOST likely to be?

Accepted Answer

B. Pyrrhotite

Answer

A. Pyrite

Answer

C. Hematite

Answer

D. Magnetite

Question 16

Hematite always exhibits a metallic luster, regardless of its variety.

Accepted Answer

True

Answer

False

Question 17

A mineral sample is identified as Galena. What is its chemical formula?

Accepted Answer

C. PbS

Answer

A. FeS2

Answer

B. CuFeS2

Answer

D. ZnS

Question 18

Calculate the specific gravity of a mineral sample if a 10 cm³ sample weighs 75.8 grams. (Specific Gravity = Density of Mineral / Density of Water, Density of Water = 1 g/cm³)

Accepted Answer

7.58

Question 19

Which of the following properties are characteristic of Magnetite?

Answer

A. Metallic Luster

Answer

B. Black Streak

Answer

C. Conchoidal Fracture

Answer

D. Strong Magnetism

Question 20

Arsenopyrite has a chemical formula of FeAsS. What percentage of its composition, by number of atoms, is sulfur?

Accepted Answer

D. 33.3%

Answer

A. 25%

Answer

B. 50%

Answer

C. 66.7%

Mineralogy Fundamentals And Metallic Minerals Identification Practice Tests

Practice Tests

Mineralogy Fundamentals and Metallic Minerals Identification

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