answersLogoWhite

0

If molten lava cools so rapidly that crystals do not have time to form, it can produce a black, greasy mineral known as obsidian. Obsidian is a natural glass that typically has a smooth, shiny appearance and is often formed from volcanic eruptions. Its rapid cooling prevents the crystallization process, resulting in its glassy texture.

User Avatar

AnswerBot

4d ago

What else can I help you with?

Related Questions

What is a gray and greasy mineral?

rocks


Mineral that can be green and greasy?

Possibly Talc


What mineral hs a greasy luster when uncut?

Sphalerite is a mineral that can exhibit a greasy luster when uncut. It is a zinc sulfide mineral that can vary in color and is commonly found in ore deposits.


What mineral has a greasy feeling and is used in writing?

Graphite


Silky greasy glassy and pearly refer to a mineral's .?

These words indicate the luster of a mineral.


Is mica greasy?

No, mica is not greasy. It is a mineral that is typically dry and powdery in texture, often used in cosmetics and makeup products for its shimmer and light-reflecting properties.


What is the texture of Graphite rock?

It is smooth. Graphite is made up of crystals. It will have angles.


Which mineral is soapy?

You are undoubtedly referring to soapstone which is Talc.


How do you remove acrylic medium gloss out of carpet?

If it has dried, use mineral oil. This will leave a greasy stain in the carpet, so then use a degreaser...but the mineral oil will break up the plastic and get it out of the carpet.


The way light bounces off a mineral is called?

The way light bounces off a mineral is called a luster. Luster is shiny, metallic, dull, glassy or greasy. Rocks are made of minerals.


The way a mineral reflects light from its surface is called?

The way a mineral reflects light from its surface is called luster. Luster describes how light is reflected off a mineral's surface and can be used to help identify the mineral. Minerals can have different types of luster, such as metallic, vitreous, pearly, dull, or greasy.


What is the way light bounces off a mineral's surface isdescribed by the mineral's?

The way light bounces off a mineral's surface is described by its luster. Luster refers to how light reflects off the mineral's surface, and can be classified as metallic, vitreous, pearly, greasy, or dull, among others. A mineral's luster can help identify and distinguish it from other minerals.