We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is Scoria?

By Christian Petersen
Updated Jun 04, 2024
Our promise to you
All Things Nature is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At All Things Nature, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Scoria is a type of volcanic rock that is full of tiny holes formed by bubbles of gas. These bubbles are called vesicles and are trapped in the rock as it hardens after a volcanic eruption. Scoria is a class of igneous rock but is categorized by its dense matrix of vesicles rather than the chemical or mineralogical makeup of the rock, which can vary. It is often dark in color, with a grey or reddish hue and is usually glassy as well. The name comes from the name of a waste material with a similar texture that results from the smelting of ores.

During volcanic eruptions, molten rock is ejected from the vent of the volcano and may take the form of lava flows or individual masses of molten rock, called volcanic bombs, that are flung into the air. Often, lava is permeated with gases that become trapped within the lava as it cools into rock. These gasses form bubbles or pockets within the hardened rock, giving it a porous, spongy aspect, although the rocks are not physically soft and compressible like a sponge. Scoria rocks can be found in large masses, random chunks, or even as crumbly layers of small particles laid down on the sides of a cinder cone volcano.

For this reason, scoria is sometimes confused with pumice, a similar volcanic rock that is riddled with many small holes and pockets of air and gas. The main difference between the two is that pumice generally has a density less than that of water due to the amount of trapped gas and will actually float. Scoria is denser than water and will sink. The air or gas bubbles in scoria tend to be larger than those in pumice, which tends to have very large numbers of smaller pockets. These differences are due to differences in the density and viscosity of the molten rock that produces them.

While it has few uses, scoria, which is sometimes called cinders, does have some value. They are sometimes crushed and used for roadbeds and for fill and to provide traction for wheeled vehicles during wintry conditions. Chunks of scoria are also sometimes sold for landscaping and gardening purposes or for use in cooking grills. When marketed in such a way, it is commonly sold as "lava rock".

All Things Nature is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Link to Sources
Discussion Comments
All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.

All Things Nature, in your inbox

Our latest articles, guides, and more, delivered daily.