Exam 5: Patterns in Nature: Minerals

Diamond and graphite are both polymorphs of pure silicon.

Which of the following minerals is hardest?

Topaz,with Mohs hardness of 8,is twice as hard as fluorite,with Mohs hardness of 4.

The most recently formed portion of any crystal is always found ____________.

The vast majority of mineral types _____________ .

Diamonds are usually found in pipes 50 to 200 m across made of _____________.

Natural glass is NOT considered a mineral because it ____________.

Trace amounts of impurity in a mineral can commonly produce significant differences in ____________ among individual crystals of this mineral.

Minerals are classified into groups primarily on a basis of ____________.

Minerals utilized by humans as a source of metal are termed ____________.

The shininess of a mineral is a helpful diagnostic property termed ____________.