Mineralogy

Minerals found in abundance of earth crust, forms igneous, sedimentary, or metamorphic rocks

• ROCK FORMING MINERALS

• ORE FORMING MINERALS

• ROCK MINERALS

• ORE MINERALS

Minerals that are of economic values, limited mode of occurrence, formed by more unusual processes

• ROCK FORMING MINERALS

• ORE FORMING MINERALS

• ROCK MINERALS

• ORE MINERALS

Not constant in most of the minerals - Due to the stain or impurities in the minerals - May indicate that mineral has undergone peculiar phenomena

• COLOR

• PLAY OF COLORS

• CHANGE OF COLORS

• IRIDESCENE

Development of series of prismatic colors by turning about in light

• COLOR

• PLAY OF COLORS

• CHANGE OF COLORS

• IRIDESCENE

Similar to play of colors but slower rotation

• COLOR

• PLAY OF COLORS

• CHANGE OF COLORS

• IRIDESCENE

Show rainbow colors either in the interior or on the surface

• COLOR

• PLAY OF COLORS

• CHANGE OF COLORS

• IRIDESCENE

Color of mineral powder - Nearly constant than the color - Determined by marking unglazed porcelain or simply by scratching with a knife and observing the powder color

• STREAK

• LUSTRE

• STRUCTURE AND FORM

• HARDNESS

Description of how much a mineral reflects light

• STREAK

• LUSTRE

• STRUCTURE AND FORM

• HARDNESS

Denote the shape and form of minerals

• STREAK

• LUSTRE

• STRUCTURE AND FORM

• HARDNESS

Resistance of minerals to abrasion or scratching - Measured relative to a scale of ten of minerals

• STREAK

• LUSTRE

• STRUCTURE AND FORM

• HARDNESS