Mineralogy

What is the chemical composition of Quartz?

• SiO4

• Si2O3

• SiO2

• Al2O3

Which of the following is not true about a mineral?

• Naturally occurring

• Organic substance

• Inorganic substance

• Definite chemical composition

Mineralogy deals with?

• Individual properties of minerals

• Formation of minerals

• More of occurrence

• Properties, formation and occurrence

Colour of a mineral depends upon its?

• Atomic structure

• Outer surface

• Composition

• Atomic structure and composition

The type of mineral showing variable colour is?

• Idiochromatic

• Allochromatic

• Iridescence

• Pseudochromatic

Lustre doesn’t depend on?

• Refractive index mineral

• Absorption of mineral

• Transmittance of mineral

• Nature of reflecting surface

Streak is an important diagnostic property of ___________

• Non-coloured minerals

• Coloured minerals

• Metallic minerals

• Non-metallic minerals

Which mineral gives streak?

• Coloured and opaque

• Colourless and opaque

• Coloured and translucent

• Coloured and transparent

Hardness of a mineral depends upon ___________

• Chemical composition

• Atomic constitution

• Chemical composition and atomic constitution

• Physical makeup

The scale of hardness is?

• Ritcher

• Mohs

• Ohm

• Mho