# Scoria

Scoria is a type of volcanic rock that forms when lava cools quickly. It is usually dark in color and has lots of small holes. People use scoria in gardening and landscaping to help soil retain water.

- **Category:** [Mineral](https://www.snappit.app/explore/categories/mineral)
- **Rarity:** Rare
- **Danger:** 2/5 · Low

![Scoria](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Scoria_Macro_Digon3.jpg&width=800)

Photo: “Jonathan Zander ( Digon3 )", CC BY-SA 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Scoria_Macro_Digon3.jpg)

## Appearance

The Scoria is a dark, porous volcanic rock known for its rough, bubbly texture. It often appears black, dark gray, or reddish-brown, looking like hardened lava foam. Its many holes, created by trapped gas bubbles, make it visually distinct and surprisingly lightweight.

## Taxonomy

- **Kingdom:** Animalia

## Interesting facts

- Did you know some ancient peoples used rocks like scoria to make surprisingly strong and lightweight concrete?
- Scientists use scoria in special labs to practice for missions to Mars, as it resembles the Martian surface!
- Scoria forms in fiery volcanic eruptions when gas-rich lava rapidly cools and solidifies!
- This rock can sometimes float on water, acting like a natural raft due to its many trapped air pockets!

## Special abilities

- **Lightweight Builder:** Scoria has a very low density due to its trapped gas bubbles, making it an excellent lightweight material for construction.
- **Natural Filter:** Scoria's interconnected pores make it great for filtering water or improving soil drainage in gardens.
- **Heat Keeper:** Scoria can absorb and retain heat well, which makes it useful in fire pits, barbecues, and sauna rocks.

## Measurements & details

- **Color Range:** black, dark gray, reddish-brown
- **Hardness:** 5
- **Luster:** dull
- **Specific Gravity:** 1.2

## Traits

- [Igneous](https://www.snappit.app/explore/traits/igneous): Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava).
- [Vitreous Luster](https://www.snappit.app/explore/traits/vitreous-luster): Vitreous luster describes a mineral's appearance when reflecting light, resembling glass, often translucent or transparent.
- [Geode](https://www.snappit.app/explore/traits/geode): A geode is a hollow, spherical rock formation lined with inward-growing crystals or concentric banding, often found in volcanic or sedimentary rocks.
- [Crystalline](https://www.snappit.app/explore/traits/crystalline): Crystalline describes a mineral or rock composed of crystals, often exhibiting a regular atomic structure and geometric external form.
- [Natural](https://www.snappit.app/explore/traits/natural): Natural refers to organisms, materials, or phenomena existing or produced by nature, not artificially created.

## Collections

- [Minerals](https://www.snappit.app/explore/collections/minerals)

## Safety

**Danger:** 2/5 · Low

Scoria is generally safe to handle, but be cautious with sharp edges.

## Frequently Asked Questions

### How to identify Scoria?

Compare crystal habit, luster, transparency, cleavage and surface texture. Minerals with different compositions can share almost the same color. Mineral Identifier: upload a photo and compare the visible details.

### What colors can Scoria be?

black, dark gray, reddish-brown

### How hard is Scoria?

5

### What kind of luster does Scoria have?

dull

### What is Scoria's specific gravity?

1.2

## More Mineral

- [Quartz Crystal](https://www.snappit.app/explore/quartz-crystal)
- [Amethyst](https://www.snappit.app/explore/amethyst)
- [Rose Quartz](https://www.snappit.app/explore/rose-quartz)
- [Citrine](https://www.snappit.app/explore/citrine)

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Source: [Scoria: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/scoria)