Scoria
A variety of Igneous
What is Scoria?
A dark-colored volcanic rock with numerous small cavities, scoria is often used in landscaping, as well as insulation and drainage works. Very similar in properties to Pumice, scoria is heavier and denser and sinks in water, while Pumice floats. It is often scattered to create traction on snow-covered roads.
Uses & Applications
Scoria's light weight gives it many industrial uses. It can be used to make concrete that is one-third lighter than other types of concrete. Since the material is filled with air pockets it acts as an excellent insulator, reducing the costs of heating and air-conditioning. Scoria is also used as a heat absorbent material in barbeques and sauna rocks.
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Scoria before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Scoria Localities Map
See where Scoria is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark red, brown, or black, etc.
- Hardness (Mohs)
- 5 - 6
- Density
- 2.5 - 2.8 g/cm³
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Scoria FAQs
How do I identify Scoria?
Scoria can be identified by its hardness of 5 - 6 on the Mohs scale, Dark red color. Look for these key characteristics when examining specimens.
What color is Scoria?
Scoria typically appears in Dark red, brown, or black, etc.. Color can vary depending on impurities and formation conditions.
How hard is Scoria?
Scoria has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
