Lava Rock
Easy to obtain
What is Lava Rock?
Lava rock is an extrusive igneous rock formed from the rapid cooling of lava. It is typically dark-colored, often black or gray, and can have a vesicular texture due to trapped gas bubbles. The composition varies depending on the source of the lava, but it is generally rich in silica and other minerals. Lava rock is commonly found near volcanoes and is used in landscaping, construction, and as a decorative element.
Optical Properties
- Refractive Index
- Variable, depends on mineral composition
- Birefringence
- Variable, depends on mineral composition
- Pleochroism
- None
- Optical Character
- Variable, depends on mineral composition
- Dispersion
- Not applicable
Discover Values
Rarity
1.5out of 5.0
30%
Popularity
3.5out of 5.0
70%
Beauty
3.0out of 5.0
60%
Cultural Value
2.5out of 5.0
50%
Collection Value
2.0out of 5.0
40%
Lava Rock Market Value Calculator
Estimate the market value of Lava Rock using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Lava Rock Localities Map
See where Lava Rock is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Black, gray, brown, reddish-brown
- Hardness (Mohs)
- 5 to 6
- Density
- 2.2 to 3.0 g/cm³
- Luster
- Vitreous to dull
- Crystal System
- Amorphous or microcrystalline
Chemical Properties
- Chemical Formula
- Variable, depends on the specific lava composition. Often includes silicates like (Na,Ca)(Si,Al)2(Si2O6)
- Elements
- Si, O, Al, Fe, Mg, Ca, Na, K
Also Known As
BasaltScoria
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