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Name = ______________________
Geology 333 - Homework #1 (Gemstones and Mineral Exploration and Mining)
Available Jan. 25; Answers are due by 10 am on Friday, Jan. 27
(10 questions, 1 point each, 10 total points)

Instructions: Follow the instructions in this homework exercise and answer all questions either on a blank sheet of paper or directly on this question sheet, which you must print out. The purpose of this exercise is to explore the topic of gemstones as well as mineral exploration and mining using information in The Study of Minerals computer software, described below.


The Study of Minerals Program - Availability

This homework assignment requires running The Study of Minerals program, which can be viewed at any PC computer (or Mac computer running Windows 7) in one of the Instructional Computing Services (ICS) Labs including:

English Building (Room 8, 608 S. Wright St., U) - this Lab is a general access lab and so it is never reserved for classes
Nevada Building (1203 1/2 W. Nevada St., U)
Oregon Building (901 W. Oregon St., U)
Illini Hall (721 S. Wright St., Champaign)
Undergraduate Library (in upper northeast corner near Room 289)
Wohlers Hall (Rooms 70A/B, 1206 S. Sixth St., C)


Information about ICS Computer Labs, including hours, class schedule, location map, and computers is at:
<https://techservices.illinois.edu/services/computer-labs/computer-lab-locations-and-hours>
NOTE: All of these facilities, except for the English Building Lab, are used for academic classes. All or part of the facility may be reserved and unavailable for your use at times during the day, so make sure to check the schedule before going to the room.
You will need to enter your U of I NetID and password to begin work on any ICS computer.


Part I - Gemstones (The Study of Minerals/Tasa Minerals Computer Software)

This assignment involves The Study of Minerals program, which can be run at any PC computer in one of the ICS Labs by first clicking on the Windows icon (lower left side) and then clicking on the following links: All Programs, Class Software, GEOL 333, Tasa Minerals. It will take a minute or two for the computer to download the program.

If you want to run the Study of Minerals program on a Mac computer, it must be running the Windows 7 operating system. After you turn on the Mac computer, it may go automatically to the Windows 7 operating system. If so, then follow the directions in the above paragraph. If not, then it will first go to a gray screen with the Apple icon and the Windows icon. Use the arrow keys to toggle to the Windows icon so that it is highlighted and then press Return. After that, follow the same navigation instructions described above (clicking on the links: All Programs, Class Software, GEOL 333, Tasa Minerals).

Ask an ICS student helper if you are unable to locate and start The Study of Minerals program.

When you reach the Main Menu, you should click on the ? Help icon in the upper left side of the screen to review controls used to navigate through the program. Click on the left-pointing arrow on the bottom right side of the screen to return to the Main Menu. NOTE: At the Main Menu, you can change the nature of the program from Intermediate to Advanced using the toggle switch in the upper right side of the screen. For this assignment, it does not matter which level you select because the material presented is identical in both versions. Click on the Chapter box Gemstones (Chapter 5 in Intermediate Level and Chapter 7 in Advanced Level) and read all of the information in this Chapter (102 frames). Answer questions (1) - (5) below while you are reading the material.

NOTE: All of the answers you provide should be based on information in The Study of Minerals computer software rather than some other resource.

(1)     (a) What is a gemstone?

 

(b) Which of the 12 birthstones is usually most valuable?


(2)     (a) What 3 characteristics determine the value of gemstones?

 

(b) Which of the 3 characteristics plays the largest role in determining value?


(3)     (a) What is the definition of the toughness of a gemstone?

 

(b) What physical property leads to a low toughness value for a gemstone?


(4) How are gemstones most commonly identified? A complete answer should include 5 different properties or measurements that are done to identify a gemstone.

 

 

 


(5)     (a) List 3 different ways that you can determine if glass was used as a fake material instead of a gemstone.

 

 

(b) How does a jeweler create faceted gemstones such as diamonds? You don't have to give all of the details of the method just a general statement of the method.


Part II - Mineral Exploration and Mining (The Study of Minerals Computer Software)

After you finish the reading the Gemstones Chapter, you should arrive at the next chapter Mineral Exploration and Mining (Chapter 6 in Intermediate Level and Chapter 8 in Advanced Level). Read all of the information in this Chapter (176 frames); however, you do NOT have to run the Mineral Exploration game at the very end of this chapter, unless you want to do that. Answer questions (6) - (10) while you are reading the material.

(6)     (a) Define the term, mineral deposit.

 

(b) Define the term, ore.

 


(7) Describe 2 ways that the size of a mineral reserve can increase.

 

 


(8) Describe the specific geologic environment of formation for the following two types of mineral deposit. In particular, you need to explain how the minerals are enriched or concentrated in the deposit.

(a) hydrothermal vein deposit

 

 

(b) placer deposit

 


(9) Why is a geologic map useful for finding ore deposits?

 

 

(10) Why is a geochemical anomaly useful for finding ore deposits?

 

 

NOTE: You do NOT have to run the Mineral Exploration game at the very end of this chapter, unless you want to do that. After you finish the reading the Mineral Exploration and Mining Chapter, click on the Menu box to return to the Main Menu. Click on Quit to exit the program.  Finally, click on LOGOFF (upper right side) and then click on Yes.