Lava
What is Lava?
Lava is molten rock erupted from a volcano. It is a complex mixture of silicate minerals, dissolved gases, and other elements. The appearance of lava varies greatly depending on its composition, temperature, and the rate at which it cools. It can range from smooth, ropy pahoehoe to rough, blocky aa lava. Lava flows can create various landforms, including lava plateaus, lava tubes, and volcanic cones.
Optical Properties
- Refractive Index
- Variable
- Birefringence
- 0.000
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- 0.000
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Lava 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.
Lava Localities Map
See where Lava is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Red, orange, black, gray
- Hardness (Mohs)
- Variable
- Density
- Variable
- Luster
- Vitreous to dull
- Crystal System
- Amorphous
Chemical Properties
- Chemical Formula
- Variable, depends on the composition
- Elements
- Si, O, Al, Fe, Mg, Ca, Na, K
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Lava FAQs
How do I identify Lava?
Lava can be identified by its hardness of Variable on the Mohs scale, Red color, Vitreous to dull luster, Amorphous crystal system. Look for these key characteristics when examining specimens.
What color is Lava?
Lava typically appears in Red, orange, black, gray. Color can vary depending on impurities and formation conditions.
How hard is Lava?
Lava has a hardness of Variable on the Mohs scale. This gives it moderate hardness.