Silicate Minerals Flashcards
Which mineral shows the following properties?
- Mafic, so it is brown.
- Exhibit as elongate prisms.
- Consist of one poor cleavage plane.
- Commonly found in metamorphic rocks.
Staurolite
Which mineral shows the following properties?
- Green in colour.
- Consists of two excellent cleavage planes orthogonal to each other.
- Associated to garnet.
Omphacite
Which mineral shows the following properties?
- Exhibits light colours, usually white and colourless.
- Found in metamorphic rocks.
- Consists of two perfect cleavage planes orthogonal to each other.
Lawsonite
Which mineral shows the following properties?
- Found in metamorphic rocks in mountain ranges.
- Water-bearing mafic, showing dark colours.
- Two cleavage planes at 120 degrees to each other.
Amphibole
What is the name of white mica?
Muscovite
Which mineral shows the following properties?
- Distinct lavender-blue colour.
- Cleavages at 120 degrees of amphiboles.
- Appears as long prisms.
- Found in metamorphic rocks in mountain ranges.
Glaucophane
Which mineral shows the following properties?
- Either blue, grey or white.
- Appear as columnar crystals.
- Consists of two perfect and one good cleavage.
- Cleavage angle is 79 degrees.
Kyanite
Which mineral shows the following properties?
- Common in granite and ores.
- Has a triangular cross-section.
- Elongate prismatic habit.
- Usually black or brown.
- No cleavage planes.
Tourmaline
Which mineral shows the following properties?
- Two cleavage planes at 90 degrees to each other.
- Commonly found in igneous rocks and mostly in the form of rectangular laths.
- Mostly pale pink in colour.
Feldspar
Which mineral shows the following properties?
- Shows prismatic and euhedral habits.
- Contains two cleavage planes at 90 degrees to each other.
- It is mafic - and hence showing dark colours such as dark grey or black.
- Found in silica-poor igneous rocks.
Pyroxene
Which mineral shows the following properties?
- Important material within mountain range rocks.
- White or brown in colour.
- Consist of fibrous layer and diamond-shaped cross section.
Sillimanite
Which mineral shows the following properties?
- Characteristic to metamorphic rocks.
- Exhibits cubic symmetry.
- No evident cleavage planes.
- Mostly brownish in colour.
Garnet
What is the name of black mica?
Biotite
Which mineral shows the following properties?
- Found in mantle with pyroxene.
- No cleavage planes.
- Forms conchoidal fractures.
Olivine
Which mineral shows the following properties?
- Found in granite and other metamorphic rocks.
- Could be found with sand and silt.
- Form sheets of perfect cleavage plane.
Mica
Which mineral shows the following properties?
- Common in metamorphic rocks heated by magma.
- Grey in colour.
- Anhedral habit.
- Consist of one cleavage only.
- Often weathered to white to grey fine-grained material.
Cordierite
Which mineral shows the following properties?
- Present in metamorphic rocks.
- Formed by alteration of igneous rocks by high temperature water.
- Green in colour.
- Only has one cleavage plane.
- Commonly found as anhedral grains.
Epidote
Which mineral shows the following properties?
- Closely related to sillimanite and kyanite.
- Usually grey or pink.
- Elongate prismatic habit.
- Has two good prismatic cleavages.
Andalusite
Which mineral shows the following properties?
- Formed by alteration of olivine.
- Usually comes with very-fine grained.
- Green in colour.
- Water-bearing magnesium-rich phyllosilicate.
Serpentine
