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MINERALS

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by

Stefanie Villarin

on 11 September 2014

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Transcript of MINERALS

Is the most obvious characteristic. Minerals colored create certain wavelengths of light that absorbed or reach the eye.
Is the property of "scratchability or resistance to abrasion. Certain minerals are used as standards of comparison for all others.
COLOR
HARDNESS
Moh´s Hardness Scale
Talc
is a mineral composed of hydrated magnesium silicate.
Gypsum
is a widely distributed mineral consisting of hydrous calcium sulfate that is used especially as a soil amendment and in making plaster of paris.
Calcite
is a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal form and including common limestone, chalk, and marble — compare aragonite.
Fluorite
is a transparent or translucent mineral of different colors that consists of the fluoride of calcium and is used especially as a steelmaking flux and in the making of opalescent and opaque glasses.
Apatite
is a transparent or translucent mineral of different colors that consists of the fluoride of calcium and is used especially as a steelmaking flux and in the making of opalescent and opaque glasses.
Feldspar
is any of a group of crystalline minerals that consist of aluminum silicates with either potassium, sodium, calcium, or barium and that are an essential constituent of nearly all crystalline rocks.
Quartz
is a mineral that is often found in the form of a hard crystal and that is used especially to make clocks and watches.
Topaz
is a a mineral that is essentially a silicate of aluminum and usually occurs in orthorhombic translucent or transparent crystals or in white translucent masses.
Corundum
is a a very hard mineral that consists of aluminum oxide occurring in massive and crystalline forms, that can be synthesized, and that is used for gemstones (as ruby and sapphire) and as an abrasive.
Diamond
is a very hard usually colorless stone that is a form of carbon and is used especially in jewelry.
TENACITY
Is the cohesiveness of a mineral or resistance of a mineral in breaking, crushing, bending or tearing.
Brittleness
Mineral powders easily
Malleability
Mineral can be hammered into sheets
Sectility
Mineral can be cut into thins shavings with a knife
Ductility
Mineral can be drawn into wire
MINERALS
Flexibility
Mineral is bent but does not resume the original space
Elasticity
A mineral bends and resumes the original space

Is the color produced by a fine powder of the mineral when scratched on a streak plate.
Two general types of luster are designated as follows:

It looks like shiny metal. May be very shiny, like a chrome car part or less shiny like a broken piece of iron.

It is translucent or transparent to light and have a colorless or white streak.
Vitreous
Looks glassy
Resinous
Looks resinous
Pearly
Iridescent pearl-like
Greasy
Appears to be covered with a thin layer of oil.
Silky
Looks fibrous or satin.
Adamantine
Brilliant luster like diamond
CLEAVAGE
Is the ability of a mineral to break in a consistent way.
FRACTURE
Is the inability of a mineral to break in a consistent way by types of fracture are, concoidal, curved breakage, fibrous or splintery, hackly-jagged with sharp edges, and irregular-rough surfaces.
SPECIFIC GRAVITY
CRYSTAL FORM
An external mineral shape which reflects the internal arrangement of the atoms.
Minerals in Shapes and Degree of Symmetry
Isometric
- the cubic crystal shaped like blocks, with similar and symmetrical faces. The symmetry form all right angles to each axes and has the same length like pyrite.
Tetragonal
- a crystal-shaped that has four-sided prisms and pyramids which are perpendicular to one another. The first two are the same length and lie on the horizontal plane. The other lie on right angle like zircon.
Hexagonal
- the crystals shaped has six-sided prisms or pyramids. A crystal which has four axes of symmetry that lie in the same plane are the same length and intersects at 120º angle. The fourth axis is not the same length, which is perpendicular to other three such as beryl.
Orthorombhic
- the crystal are short and stubby which has three unequal axes, all at right angles to one another like topaz.

Naturally occurring, inorganic, crystalline solid which has a definite chemical composition, and regular stable over a range of temperature and pressure.
Monoclinic
- crystal are short and stubby with tilted faces at each end with three unequal axes. Two axes lie in the same plane at right angles to each other while the other lie on its gypsum.
Triclinic
- crystals are flat with sharp edges, each crystal has three unequal axes and not perpendicular to one another like feldspar.
It is the appearance of a single crystal or an aggregate of crystals that identified.
Types of Crystals and Aggregates
1. Isolated single mineral crystals
Bladed
- flattened crystals that looks like a knife
Acicular - needle-like crystals
CRYSTAL HABITS AND AGGREGATES
Capillary - thinner mineral like a hair
2. Groups of distinct crystals
Dendritic
- looks like small veins on a tree leaf
Radiated
- crystals that appeared in a radial pattern
Drusy
- a surface that contained very small crystals
3. Groups of Distinct crystals occurring in a parallel or spherical form
Bladed
- flat bladed crystals
Columnar
- column like crystals
Fibrous
- parallel fibers
Colloform
- like botryoidal like resembled bunch of grapes
Physical Properties
of
MINERALS

Color
Hardness
Tenacity
Streak
Luster
Cleavage
Fracture
Specific Gravity
Crystal Form
Crystal Habits and Aggregates
STREAK
LUSTER
Is an appearance of mineral when it reflected to light.
Formula:
SG=Density of Liquid(g/mL)/ Density of Water(1.00g/mL)
Expresses a ratio between the mass of a substance and the mass of an equal volume of water at 4 degrees C.

Non-metallic
Metallic
Presented by:
Blay, Benson D.
Ramirez, John Paul V.
Rosales, Maiden Marie R.
Villarin, Stefanie R.
NS 101
Presented to:
Mr. Domingo C. Luistro
Full transcript