Chapter 1.2- Properties Of Minerals
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Which of the following is not used as Primary Identifying properties of minerals? A. Cleavage B. Crystal Habit C. Streak D. Taste
D. Taste
The _____ property that describes the shape of minerals.
Crystal Habit
What is a mineral cleavage?
It describes how the mineral breaks under pressure.
Most minerals have tendency to break in a preferred direction along smooth surface. Where the Atoms connect it forms a weak point. In example, _______ is a mineral that resistant to breaking but peels quite easily.
Mica
True or False All minerals have cleavage.
False Not all minerals have cleavage instead,some have fracture Example. The shatter like glass
It is based upon the arrangement of Atoms within the crystalline structure.
Hardness
It is a primary property that describes how hard the mineral is.
Hardness
What is being used to grade the hardness of a minerals?
Mohs Scale of Hardness
True or false Hardness is graded from 1-20, using Mohs Scale of Hardness
False - Hardness of minerals is graded from 1-10
Which of the following is the softest mineral? A. Calcite B. Gypsum C. Talc D. Fluorite
C. Talc - mohs scale =1 Gypsum =2 Calcite =3 Flourite = 4
Which of the following is the hardest minerals? A. Corundum B. Topaz C. Quarts D. Diamond
D. Diamond= mohs scale is 10 Mohs scale Quarts = 7 Topaz= 8 Corundum= 9
True or false General classification of hardness is acceptable based on scratch test.
True
In scratch test you can consider the mineral as soft if ? A. Able to scratched with a knife B. Able to scratched with a fingernail C. Able to scratch glass with the mineral
B. Able to scratched with fingernail.
In Scratch test, a mineral is consider as hard if? A. Able to scratch rocks with the mineral. B. Able to scratch wood with the mineral. C. Able to scratch glass with the mineral.
C. Able to scratch glass with mineral
In Scratch test, a medium hardness of mineral is considered if?
Not able to scratched with fingernail, nor able to scratch glass with mineral.
It is the property of Minerals that describes the ratio of mineral’s weight to water.
Specific Gravity.
It describes the color of the mineral in solid form.
Color
True or False Identifying minerals using color as the sole basis for identification can easily lead to misindentification
True Because some minerals such as sulfur are distinctly colored– always some shade of yellow–it’s relatively common to find color variation within a same minerals.
It determines the color of the minerals in powdered form.
Steak
It is a piece of unglazed porcelain that is used to determine the streak of a mineral.
Streak plate
Which of the following is not a secondary identifying properties of mineral? A. Magnetism B. Specific gravity C. Flouorescense D. Taste E. Reaction to acid F. Striations G. Luster
B. Specific gravity • because it is a primary identifying property.
It is being describe using these words Pearly, waxy, shiny, dull, Earthy, Glassy.
Luster
The _____ describes the surface appearance of the mineral.
Luster
It describes the inherent magnetic qualities. Example: magnetite= yes, Quartz = no.
Magnetism