2. Minerals and Rocks
Mineral Identification — Quiz
Test your understanding of mineral identification with 5 practice questions.
Practice Questions
Question 1
Which of the following minerals is most likely to have a hardness around 2 on the Mohs scale and can be scratched by a fingernail?
Question 2
A mineral sample shows a hardness of about 4. It can scratch a copper penny (hardness ~3.5) but is scratched by a steel nail (hardness ~6.5). Which of the following minerals best fits this hardness range?
Question 3
Which of the following minerals is most likely to exhibit a vitreous (glassy) luster and conchoidal fracture?
Question 4
A mineral is tested and found to have two directions of cleavage at about 60 and 120 degrees. Which of the following minerals best fits this description?
Question 5
Which mineral is most likely to have a hardness of about 3 on the Mohs scale and effervesce when exposed to dilute hydrochloric acid (HCl)?