Minerals, Lab done

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School

Laramie County Community College *

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Course

1001

Subject

Geology

Date

Dec 6, 2023

Type

docx

Pages

6

Uploaded by ChefWillpower15868

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MINERALS, LAB REPORT Insert a picture of your mineral kit in the space below and delete extra rows if needed. EXERCISE 1 DATA SHEET Table 3. Specific Gravity Mineral Letter Dry Mass (g) Total Volume (mL) Displaced Volume (mL) Specific Gravity A 17.9 106 6 2.98 B 49.5 110 10 4.95 D 27.6 110 10 2.76 E 2.4 101 1 2.4 F 9.5 104 4 2.37 G 19.3 108 8 2.41 H 1.6 100.5 0.5 3.2 I 31.8 109.5 9.5 3.34 Note: There is no mineral “C”. 1 ©eScience Labs V v.F23
Post-Ex 1 Questions 1. Why is it helpful to measure the specific gravity of a mineral? Each mineral has its own specific gravity. Because of this, the identification the specific gravity of an unknown mineral will help narrow down the identity of the mineral itself. It is a helpful tool in identifying different minerals. 2. Which mineral had the highest density/specific gravity? What does this tell you about the elements (or compounds) that make up this mineral? (Hint: Think about was density means. Think about how elements are arranged on the periodic table based on their properties.) The mineral b has the highest specific gravity of 4.95 this implies the minerals which element b is composed have higher density and are mostly metallic since metallic minerals have high density. EXERCISE 2 DATA SHEET Table 5. Mineral Identification Mineral Sample Color/ Clarity Luster Streak Hardness Cleavage Other Distinctive Properties Name of Mineral A White gray Non- sparkly none 7 Conchoida l fracture Scratches glass quartz B Dark yellow gold metallic Light grey 6-6.5 Uneven fracture Heavy pyrite D Translucen t to cloudy, or clear; colorless to yellow vitreous white Between a fingernail and copper plate 3 directions not at 90° Effervesces with acid Calcite 2 ©eScience Labs V v.F23
E Brown opaque pearly white 1 perfect Thin flakes talc Mineral Sample Color/ Clarity Luster Streak Hardness Cleavage Other Distinctive Properties Name of Mineral F Pink colorless Vitreous White gray 6 90 degrees Tabular appearance Potassium feldspar G Blue white Vitreous gray 2.5 4 octahedral Fluorescent fluorite H black vitreous gray 2.5 One perfect Easily splits biotite I white silky white 2 1 Fluorescent Gypsum Note: There is no mineral “C”. Post-Ex2 Qs: 1. What properties of Mineral B could be used to distinguish it from gold? Properties of Mineral B:•Name: Pyrite•Nickname: FeS2•Color/Clarity: Yellow, gold, opaque•Luster: metallic•Streak: greenish black•Hardness: 6-6.65•Cleavage: uneven•Specific Gravity: cubic, octahedral-Color and Clarity of mineral B could be used to distinguish it from gold.-Fools Gold is another name for Pyrite. Gold and Pyrite are minerals that can bemistaken for each other because they have almost the same color. The specificgravity is the easiest to distinguish between them because gold's so concentrated 2. Write the name of Mineral B, its common nickname (see Figure 4) and fill in the data about each of the properties. Compare the differences between the two minerals, pyrite and gold, and summarize your findings in a short paragraph. Is the nickname accurate? Why or why not? Properties of Mineral B: Name _ ____pyrite___________________ Nickname __fes2___________________ 3 ©eScience Labs V v.F23
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