EASC Lab Exam 1 Minerals

• Mineral Name: Quartz

• Lustre: N/M glassy

• Colour/Streak: White

• Hardness: >6.5 (7) Very Hard

• Cleavage/Fracture: Conchoidal Fracture

• Physical Properties: Waxy feel, non-magnetic

• Mineral Class: Non-ferromagnesian Silicate

• Chemical Formula: SiO2

• Mineral Name: Calcite

• Lustre: N/M

• Colour/Streak: White/Transparent

• Hardness: 2.5-5.5 (3) Soft

• Cleavage/Fracture: 3 Cleavage Directions not at 90, Rhombic

• Physical Properties: Reacts with HCL, non-magnetic

• Mineral Class: Carbonate

• Chemical Formula: CaCO3

• Mineral Name: Muscovite Mica

• Lustre: N/M

• Colour/Streak: Colourless

• Hardness: <2.5 (2.5) Very Soft

• Cleavage/Fracture: 1 Cleavage Direction, Basal, With fracture on edge

• Physical Properties: non-magnetic

• Mineral Class: Non-ferromagnesian Silicate

• Chemical Formula:

• Mineral Name: Biotite Mica

• Lustre: N/M

• Colour/Streak: Black, Gray

• Hardness: <2.5 (2.5) Very Soft

• Cleavage/Fracture: 1 Cleavage Direction, Basal, With fracture on edge

• Physical Properties: Non-magnetic

• Mineral Class: Ferromagnesian Silicate

• Chemical Formula:

• Mineral Name: Magnetite

• Lustre: M

• Colour/Streak: Gray

• Hardness: 5.5-6.5 Hard

• Cleavage/Fracture: Too small to see

• Physical Properties: Glittery, Magnetic

• Mineral Class: Oxide

• Chemical Formula: Fe3O4

• Mineral Name: Talc

• Lustre: N/M

• Colour/Streak: White

• Hardness: <2.5 (1) Very Soft

• Cleavage/Fracture: To small to see

• Physical Properties: Soft soapy feel

• Mineral Class: NF silicate

• Chemical Formula:

• Mineral Name: Olivine

• Lustre: N/M

• Colour/Streak: Green

• Hardness: >6.5 Very Hard

• Cleavage/Fracture: Conchoidal fracture

• Physical Properties: Shiny grains under microscope

• Mineral Class: F silicate

• Chemical Formula:

• Mineral Name: Dolomite

• Lustre: N/M

• Colour/Streak: Variety/White

• Hardness: 2.5-5.5 Soft

• Cleavage/Fracture: 3 Cleavage Directions not at 90, Rhombic

• Physical Properties: Reacts with HCL

• Mineral Class: Carbonate

• Chemical Formula:

• Mineral Name: Sphalerite

• Lustre: M

• Colour/Streak: Dark colour/light yellow

• Hardness: 2.5-5.5 Soft

• Cleavage/Fracture: 6 Cleavage Directions

• Physical Properties:

• Mineral Class: Sulphide

• Chemical Formula: ZnS

• Mineral Name: Halide

• Lustre: N/M

• Colour/Streak: Variety/White

• Hardness: 2.5-5.5 (4) Soft

• Cleavage/Fracture: 3 Cleavage Directions

• Physical Properties: Can form a tetragonal dipyramid

• Mineral Class: Fluorite

• Chemical Formula: CaF2

• Mineral Name: Hematite

• Lustre: M

• Colour/Streak: Brown and Gray

• Hardness: 5.5-6.5 Hard

• Cleavage/Fracture: Too small to see

• Physical Properties: Metallic sample are specular

• Mineral Class: Oxide

• Chemical Formula: Fe2O3

• Mineral Name: Halite

• Lustre: N/M

• Colour/Streak: Transparent/White

• Hardness: 2.5-5.5 Soft

• Cleavage/Fracture: 3 Cleavage directions at 90, Cubic

• Physical Properties: Salty Taste

• Mineral Class: Halide

• Chemical Formula: NaCl

• Mineral Name: Galena

• Lustre: M

• Colour/Streak: Gray/Black

• Hardness: 2.5-5.5 Soft

• Cleavage/Fracture: 3 Cleavage Directions at 90, Cubic

• Physical Properties: Very Dense, Heavy

• Mineral Class: Sulphide

• Chemical Formula: PbS

• Mineral Name: Pyrite

• Lustre: M

• Colour/Streak: Gray and Gold

• Hardness: 5.5-6.5 Hard

• Cleavage/Fracture: Conchoidal Fracture

• Physical Properties: crystals form as cubes

• Mineral Class: Sulphide

• Chemical Formula: FeS2

• Mineral Name: Chalcopyrite

• Lustre: M

• Colour/Streak: Gray and Gold

• Hardness: 2.5-5.5 (5) Soft

• Cleavage/Fracture: Too small to see

• Physical Properties: Looks like gold spray paint

• Mineral Class: Sulphide

• Chemical Formula: CuFeS2

• Mineral Name: Gypsum

• Lustre: N/M

• Colour/Streak: White/White

• Hardness: <2.5 (2) Very Soft

• Cleavage/Fracture: 1 Cleavage Direction hard to see

• Physical Properties: Soft but not soapy

• Mineral Class: Sulphate

• Chemical Formula: CaSO4

• Mineral Name: Amphibole

• Lustre: N/M

• Colour/Streak: Dark green to Black/White

• Hardness: 5.5-6.5 Hard

• Cleavage/Fracture: 2 Cleavage Directions not at 90, Uneven Fracture

• Physical Properties: Almost has a wood grain look

• Mineral Class: F Silicate

• Chemical Formula:

• Mineral Name: Pyroxene

• Lustre: N/M

• Colour/Streak: Dark green to Black/White

• Hardness: 5.5-6.5 Hard

• Cleavage/Fracture: 2 Cleavages at 90, irregular fracture

• Physical Properties:

• Mineral Class: F Silicate

• Chemical Formula:

• Mineral Name: K-Spar (Orthoclase)

• Lustre: N/M

• Colour/Streak: Salmon Pink/White

• Hardness: 5.5-6.5 (6) Hard

• Cleavage/Fracture: 2 Cleavage Directions at 90, Uneven Fracture

• Physical Properties: exsolution lamellae

• Mineral Class: NF Silicate

• Chemical Formula:

• Mineral Name: Na-rich Plagioclase Spar (Albite)

• Lustre: N/M

• Colour/Streak: White

• Hardness: 5.5-6.5 (6) Hard

• Cleavage/Fracture: 2 Cleavage Directions at 90, Uneven Fracture

• Physical Properties: Striations

• Mineral Class: NF Silicate

• Chemical Formula:

• Mineral Name: Ca-rich Plagioclase Spar (Labradorite)

• Lustre: N/M

• Colour/Streak: Dark/White

• Hardness: 5.5-6.5 (6) Hard

• Cleavage/Fracture: 2 Cleavage Directions at 90, Uneven Fracture

• Physical Properties: Striations

• Mineral Class: NF Silicate

• Chemical Formula: