mineral identification
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Mineral Identification. Mr. Jensen Ref: McGuire – ES/PS. Minerals can be identified using their distinctive physical and chemical properties. . Mineral properties include: _______________ _______________ _______________ _______________ _______________ _______________ _______________. - PowerPoint PPT PresentationTRANSCRIPT
Mineral Identification
Mr. Jensen Ref: McGuire – ES/PS
Identifying Minerals• Minerals can be
identified using their distinctive physical and chemical properties.
• Mineral properties include:– _______________– _______________– _______________– _______________– _______________– _______________– _______________
Table 2-1: Common
Rock Forming Minerals
Minerals: Color• Color
– Many minerals have a characteristic color
– _______________ may discolor certain light colored minerals• Ex. Quartz and calcite
which are typically colorless.
– Dark color minerals typically do not have this problem.
Minerals: Luster• Luster
– Describes the way light is ____________ from the freshly cut surface of a mineral.
– _______________ Luster• Hard shiny look like polished metal.• Light is unable to penetrate.• Ex. Pyrite, galena and magnetite
– _______________ Luster• May be shiny but some light is able to penetrate.• Includes glassy, waxy, pearly and earthy (dull) lusters• Ex. Calcite, quartz and feldspar
Minerals: Streak• Streak
– The color of the mineral in a _______________ form.
– The test for streak is performed by rubbing a fresh corner of the mineral across a white, unglazed __________ __________.
– Several minerals have a streak that is not the same color as the mineral itself.• Most metallic luster minerals
have a dark colored streak. (Ex. Graphite, Pyrite)
Minerals: Crystal Structure
• Crystal Structure– Minerals form
characteristically ____________ crystals
– A crystal is a regularly shaped solid formed by an __________ __________ of atoms.
Minerals: Hardness• Hardness
– Minerals differ in hardness– Tested by _______________ mineral with other materials
of known hardness– Friedrich _______ (Geologist) created the _______ scale
for hardness
Minerals: Cleavage• Cleavage
– If a mineral breaks readily along ______ _________ it shows cleavage
– Many minerals break along ______ _________ called cleavage planes
– Minerals that break along even surfaces that do not follow atomic arrangement (crystal faces) are said to show ______________
Minerals: Density• Density
– Minerals vary in density and __________ __________ (ratio of density and water)