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    Mineral Flowchart RM 2013

    Uploaded by

    Grace Melissa Choi
    The document lists various minerals and their properties, including hardness on the Mohs scale, crystal structure, color, luster, cleavage, and other identifying features. It begins with ten minerals at the higher end of the hardness scale including diamond and corundum, and progresses through softer minerals down to talc. The minerals are grouped based on properties such as metallic luster, streak color, and cleavage characteristics. Key identifying information is provided for each mineral to allow for comparison and identification.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Mineral Flowchart RM 2013

    Uploaded by

    Grace Melissa Choi
    199 views2 pages
    The document lists various minerals and their properties, including hardness on the Mohs scale, crystal structure, color, luster, cleavage, and other identifying features. It begins with ten minerals at the higher end of the hardness scale including diamond and corundum, and progresses through softer minerals down to talc. The minerals are grouped based on properties such as metallic luster, streak color, and cleavage characteristics. Key identifying information is provided for each mineral to allow for comparison and identification.

    Original Description:

    Mineral Flowchart Rm 2013

    Original Title

    Mineral Flowchart Rm 2013

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    The document lists various minerals and their properties, including hardness on the Mohs scale, crystal structure, color, luster, cleavage, and other identifying features. It begins with ten minerals at the higher end of the hardness scale including diamond and corundum, and progresses through softer minerals down to talc. The minerals are grouped based on properties such as metallic luster, streak color, and cleavage characteristics. Key identifying information is provided for each mineral to allow for comparison and identification.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    199 views2 pages

    Mineral Flowchart RM 2013

    Uploaded by

    Grace Melissa Choi
    The document lists various minerals and their properties, including hardness on the Mohs scale, crystal structure, color, luster, cleavage, and other identifying features. It begins with ten minerals at the higher end of the hardness scale including diamond and corundum, and progresses through softer minerals down to talc. The minerals are grouped based on properties such as metallic luster, streak color, and cleavage characteristics. Key identifying information is provided for each mineral to allow for comparison and identification.

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    Mohs Hardness Scale

    Tools
    10. Diamond
    9. Corundum
    8. Topaz
    7. Quartz
    6. Orthoclase Streak Plate
    5.5
    Glass Plate
    5. Apatite
    4.5
    Steel Nail
    4. Fluorite
    3.5
    Copper Penny
    3. Calcite
    2.5
    Finger Nail
    2. Gypsum
    1. Talc

    No
    Cleavage

    1 Direction

    Harder Than
    Glass

    Vitreous Luster, any color can occur.


    Conchoidal fracture, hexagonal crystals
    common, Hardness 7

    Quartz

    Barrel shaped hexagonal crystals, Hardness 9,


    Commonly brown

    Corundum

    Dodecahedron
    Crystal Balls

    Color often dark red or reddish brown. Vitreous


    luster. Fracture may resemble poor cleavage,
    Hardness 7-7.5

    Garnet

    Green Sand
    Grains

    Vitreous luster, commonly in granular masses


    (looks like sand grains), Hardness 6.5-7

    Olivine

    Forms X-shaped
    crystals

    Vitreous, resinous, or dull luster. Red-brown to


    brownish-black. Prismatic and
    X or cross shaped crystals

    Staurolite

    Blue Blades

    Vitreous Luster, Light Blue. Hardness 5


    parallel to crystal, 7 perpendicular. Blade
    shaped crystals

    Kyanite

    Cleavage
    difficult to
    determine

    Bluish green. Hardness 7.5-8. Elongate sixsided crystal prisms with flat ends common

    Beryl

    Vitreous luster, dark green or black. Cleavage


    planes at 56 and 124 degrees.

    Hornblende

    Vitreous to dull luster, black to dark green.


    Tends to look "blocky"

    Augite

    Vitreous Luster, darker colors, hardness 6.


    Striations visible on cleavage face

    Plagioclase
    (Ca-Plag)

    2 directions not
    at 90
    Cleavage

    Striations

    2 directions at
    Vitreous Luster, light colors often, hardness 6.
    Dissolution lines
    90
    Dissolution lines visible
    NonMetallic

    Cleavage
    Next Page
    Red-brown
    Streak
    Softer Than
    Glass

    Strong redbrown streak

    Yellow/ Light
    Brown Streak

    Plagioclase
    (Na-Plag)

    Vitreous Luster, Usually pink. Hardness 6.

    Potassium
    Feldspar
    (K-Spar)

    Earthy luster and strong red color

    Hematite

    Earthy Luster, found in earthy masses,


    Hardness 1

    Limonite

    Light Yellow

    Bright Yellow
    color

    Resinous or vitreous luster. Bright yellow color.


    Hardness 1.5-2.5

    Sulfur

    Light Green

    Bright
    Bluegreen Color

    Bright bluegreen/ green. Hardness 3.5-4.


    Occurs usually as tiny crystals. Often
    associated with azurite (bright blue)

    Malachite

    Soapy Feel

    Pearly to greasy luster. Pale shade of green


    and gray. Hardness 1. Soapy feel

    Talc

    Reacts with Acid

    Earthy luster. Hardness 3.5-4. Reacts with HCl


    but only when powdered

    Dolomite

    No
    Cleavage
    White Streak

    Light Flakey
    Sheets

    Vitreous luster. Colorless to light shades of


    green. Hardness 2-3. White streak

    Muscovite

    Dark Flakey
    Sheets

    Vitreous luster. Dark green, brown, and black.


    Hardness 2.5-3. White to grey streak

    Biotite

    Vitreous luster. Green to greenish black. White


    to pale green. May have slippery feel

    Chlorite

    Can Easily
    Scratch with
    Fingernail.
    Sometimes
    might have 3
    Cleavages

    Vitreous to pearly luster. Colorless to white.


    Hardness 2. Crystals common, found in
    columns and easy to scratch with fingernail

    Gypsum

    Tastes like Salt

    Vitreous luster. Hardness 2.5. Perfect cubic


    cleavage. Tastes like salt.

    Halite

    1 Direction

    Non
    Metallic

    Softer than
    Glass

    Cleavage

    3 Directions at
    90

    3 Directions not
    Vitreous luster, white to grey streak. Many
    Reacts with Acid
    at 90
    colors possible. Hardness 3. Reacts with acid.

    Black to grey
    streak

    Reacts with Acid

    Vitreous to Pearly Luster. Many colors


    possible, white streak. Only reacts with acid
    when powdered

    Dolomite

    4 Directions

    Lights up under
    Fluorescent
    Light

    Vitreous Luster, many colors possible. Glows


    in fluorescent light.

    Fluorite

    No Cleavage

    Magnetic

    Black color. Hardness 5.5-6. No cleavage.


    Strongly magnetic.

    Magnetite

    1 Direction of
    Cleavage,
    Difficult to see

    Smudges
    fingers

    Dark grey to black color. Hardness 1. Greasy


    feel and smudges fingers. Hardness 1

    Graphite

    Bright metallic luster. Shiny lead grey color.


    3 Directions of
    Perfect cleavage Hardness 2.5. Perfect cubic cleavage. Streak
    cleavage at 90
    lead-grey. High specific gravity

    Metallic

    Green-black,
    or dark green
    streak

    Calcite

    No Cleavage

    "Fools Gold"

    No Cleavage

    Red Streak

    No Cleavage

    Yellow,
    brown, or
    white streak

    No Cleavage

    Strong redbrown Streak

    Galena

    Brass-yellow color. Hardness 6-6.5. No


    cleavage. Cubic crystals common with striated
    faces. "Fool's gold".

    Pyrite

    Brass-yellow color, often tarnished to purple of


    bronze. Hardness 3.5-4

    Chalcopyrite

    Steel-grey color. Hardness 5-6. Often breaks


    into thin sheets. Brittle

    Hematite

    Yellow-brown to dark brown color, also maybe


    black. Hardness 5-5.5. Brittle

    Limonite

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