ELS Quiz 3. Minerals

Which of the following is the crystalline structure of the mineral Emerald?

• Isometric

• Tetragonal

• Hexagonal

• Trigonal

Which specific characteristic of a mineral explains that, there must be no traces of organic materials from the once part of an organism?

• A mineral is naturally-occuring

• A mineral is inorganic

• A mineral is a homogenous solid

• A mineral has a definite chemical composition

All of the following dictates the color/hue of a mineral EXCEPT for:

• composition

• ordered internal structure

• cystal system

• colors of light

Mineraloids are naturally-occurring , inorganic, homogenous solid with definite mechanical compositions but with no ordered internal structure.

• TRUE

• FALSE

• TRALSE

The nonmetallic luster variation of the mineral topaz falls under what type?

• pearly

• adamantine

• vitreous

• dull

Polymorphous minerals are under instances where they share a common chemical composition but of different arrangement of their atoms.

• TRUE

• FALSE

A crystal is something that possesses beautiful ______ facets or faces that are often associated with cut or polished gems.

The presence of cleavage in a mineral is dependent of its hardness.

• TRUE

• FALSE

When a mineral does not exhibit cleavage, it breaks in an irregular manner which is called _________.

Which among the following shows the correct chemical formula for Pyrite?

• Fe(II)S

• FeS

• 2FeS

• FeS₂