Samantha_Hernandez_Lab-4
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School
Johnson County Community College *
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Course
101
Subject
Geology
Date
Dec 6, 2023
Type
docx
Pages
4
Uploaded by SuperMongoosePerson417
Ore Forming Minerals (Lab 4)
For this lab you will need:
Rock and Minerals Quick Study Guide
Mineral and Rock Identification Chart (in Canvas)
Rock and Mineral Set
o
Hardness set included with the Rock and Mineral Set
Penny
Nail
Glass Plate
Streak Plate (white and colored)
Magnet
Hand lens
In this lab you will identify 9 common
ore forming minerals
.
Ore forming minerals are minerals that have
economic value and can be extracted at a reasonable profit.
Often these ores contain valuable metals
such as iron, aluminum, zinc, and lead.
You will use the skills acquired in the previous lab to identify
these ore forming minerals.
You may want to consult the Mineral Properties file to refresh your skills.
Examine the
Rock and Minerals Quick Study Guide
and the
Mineral Identification Flow Charts in the
Minerals and Rocks Description Guide
and notice that each column corresponds to a physical property
such as luster, hardness, streak, cleavage/fracture, other special properties, and mineral name.
Choose a
mineral by its sample number and begin observing the physical properties and record those observations
in the appropriate column.
For the cleavage/fracture column, choose either cleavage or fracture.
If you
choose cleavage, indicate the number of cleavage planes and the angle at which they intersect (i.e. 3 at
90°).
If you choose fracture, indicate whether it is an uneven or conchoidal fracture.
Once you have
identified the physical properties, use the Mineral Identification Flow Chart to help you then identify the
mineral.
The Ore Forming Minerals in the lab are:
Bauxite
Magnetite
Chalcopyrite
Galena
Sphalerite
Hematite
Gypsum
Fluorite
Talc
Once you have completed the table, use the internet to determine which ore (such as iron, zinc, copper,
etc.) for which each mineral is mined. List the name of the mineral below and its corresponding ore:
Hint: some minerals will be mined for the mineral itself
For example: Sulfur is mined for sulfur which is used in fertilizers.
Ore Forming Minerals – Identification Sheet
Sample
Luster
Hardness
Streak Color
Cleavage/Fracture
Other Special
Properties
Mineral Name
36
Metallic
2.5
Black
Has cleavage and
subconchoidal fracture
Shiny and soft,
streak was pencil
like
Galena
37
Metallic
3.5-4
Dark green
Poor cleavage, uneven
fracture
Brittle
Chalcopyrite
38
Metallic
5.5- 6.5
Black
No cleavage
Silver colored
Hematite
39
Metallic
6
Reddish brown
No cleavage, breaks with
an uneven conchoidal
fracture
Rough textured
Magnetite
40
Dull, earthy
1-3
tan
No cleavage, uneven
fracture
Soft and light in
weight
Bauxite
43
Resinous,
adamantine
3.5-4
Yellowish
brown
1 cleavage, uneven
Brittle
Sphalerite
44
Non- metallic,
glassy
4
White
Has cleavage and
subconchoidal fracture
Green and
transparent
Fluorite
45
Non- metallic,
pearly
2
white
Conchoidal fracture
Chalky
Gypsum
19
Non- metallic,
dull
1
Light gray
1 cleavage
Soft, streak was
pencil like
Talc
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Ore and Mineral
List below which ore each mineral you identified in the chart is mined for:
1.
Iron:
2.
Zinc:
3.
Lead:
4.
Aluminum:
5.
Barium:
6.
Talcum powder: