Mineral Luster Characteristics and Identification

The video tutorial explains different types of mineral lusters, including earthy, metallic, glassy, pearly, and greasy. Each luster type is described in terms of its appearance and texture, with examples provided to illustrate the differences. Earthy luster is dull and non-reflective, metallic luster is shiny like metal, glassy luster resembles glass, pearly luster has a muted shine similar to pearls, and greasy luster appears as if covered with a greasy film.

What is the main characteristic of a mineral with an earthy luster?

• It is very shiny.

• It is dull and non-reflective.

• It has a greasy film.

• It looks like metal.

How does a mineral with a metallic luster appear?

• It is dull and non-reflective.

• It has a pearly shine.

• It appears shiny and metal-like.

• It looks like glass.

Which luster is described as having a shine similar to glass?

• Pearly luster

• Glassy luster

• Metallic luster

• Earthy luster

What is a key feature of a mineral with a pearly luster?

• It is very shiny like metal.

• It looks like glass.

• It has a muted shine, similar to pearls or shells.

• It has a greasy film.

How does a mineral with a greasy luster feel to the touch?

• It feels smooth or greasy.

• It feels rough and gritty.

• It feels like metal.

• It feels like glass.

Which luster might leave your fingers feeling smooth or powdery after touching it?

• Greasy luster

• Glassy luster

• Metallic luster

• Earthy luster

Which luster is described as having a shine that is not as bright as metallic luster?

• Greasy luster

• Pearly luster

• Earthy luster

• Glassy luster