Lab2_Exercise1_DataSheet
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1010L
Subject
Geology
Date
Apr 29, 2024
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docx
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EXERCISE 1 DATA SHEET
Table 4. Mineral Identification
Mineral
Sample
Color/
Clarity
Luster
Streak
Hardness
Cleavage
Other
Distinctive
Properties
Name of
Mineral
A
Colorless, white, (may occur
in all colors)/ transparen
t to translucent
Vitreous to
greasy
White
7
Conchoida
l fracture Scratches glass
Quartz B
Gold Metallic Greenish black
6 – 6.5
Uneven fracture Cubic, octahedral
Pyrite C
D
Colorless, white, yellow, brown, pink/ transparen
t to translucent
Vitreous to iridescent
White 3
Three not at 90°
Effervesces in acid when powdered
Calcite E
Colorless, yellow, brown/ transparen
t to translucent
Vitreous
White 2-2.5
One (perfect)
Easily splits into thin sheets
Muscovite
F
White, pink, orange, brown/ Vitreous
White 6
Two at 90°
Frequently twinned
Potassium Feldspar
©eScience Labs, 2016
opaque
G
Colorless,
white, gray/ transpare
nt to transluce
nt
Vitreous or
silky
White 2 One (perfect)
Sometimes fluorescent in
ultraviolet light
Gypsum
H
Dark brown, transluce
nt
Vitreous
Grey-
brown
Less than 6
One perfect Split into thin sheet
Biotite I
Colorless,
white, gray/ opaque
Vitreous;
may be
iridescent
White
6
Two at 90
Commonly shows fine, parallel striations
Plagioclase Feldspar
1. What properties of Mineral B could be used to distinguish it from gold?
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 and summarize your findings in a short paragraph. Is the nickname accurate? Why or why not?
1a. The differences between native gold and Iron pyrite is the streak, with pyrite being a greenish black and gold being yellow, the hardness, the cleavage, and the specific gravity. Pyrite is harder, being between 6 and 6.5 compared to golds 2.5 – 3. The cleavage is also ©eScience Labs, 2016
different with, gold is malleable and absent of cleavage while pyrite has an uneven fracture. And
the specific gravity is also different with gold having a much higher number. 2. Marble is a rock that is composed primarily of the carbonate minerals calcite (CaCO
3
) and dolomite (Ca,Mg(CO
3
)
2
). In Exercise 1, you saw the way carbonate minerals react to a drop of acetic acid. Based on this observation, why do you think people who care for monuments and sculptures made of marble are concerned about acid rain? 2a. Acid rain's interaction with marble's carbonate minerals erodes surfaces, risking aesthetic and historical value. Vigilant preservation and mitigation efforts are vital to protect these cultural treasures for the future.
©eScience Labs, 2016
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