What is the shiny stuff in a rock called?

Answer 1

Most extrusive igneous rocks are usually shiny and smooth. This is because, they cool, solidify, and crystalize rapidly on the earth's surface, where there is less obstruction, and no enclosures.

Answer 2

Most probably mica -- a group of aluminum silicate minerals. They occur in igneous and metamorphic rock. Micas resist electricity and heat and consequently are used as insulation etc, in electric and heating elements.

Answer 3

Shiny rocks or rocks that sparkle usually contain crystalline minerals.

Answer 4

The shine of rocks is referring to the luster.

Answer 5

A metal is what you are reffering to.

Answer 6

Obsidian. :)

Answer 7

It depends on how long it takes to melt.

Answer 8

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