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2. Fire rock - Wikipedia

   en.wikipedia.org/wiki/Fire_rock

   Fire rock is manufactured lava rock that is sold in various shapes and sizes, and is used as a medium for retaining direct heat. Fire rocks are used in natural gas fireplaces or in natural gas or propane burning fire pits. It may be used as the main fuel distributor or as padding for fire glass to go on top.

3. Category:Lava rock buildings and structures - Wikipedia

   en.wikipedia.org/wiki/Category:Lava_rock...

   Pages in category "Lava rock buildings and structures" The following 24 pages are in this category, out of 24 total. This list may not reflect recent changes .

4. Volcanic rock - Wikipedia

   en.wikipedia.org/wiki/Volcanic_rock

   The terms lava stone and lava rock are more used by marketers than geologists, who would likely say "volcanic rock" (because lava is a molten liquid and rock is solid). "Lava stone" may describe anything from a friable silicic pumice to solid mafic flow basalt, and is sometimes used to describe rocks that were never lava, but look as if they ...

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6. Category:Volcanic rocks - Wikipedia

   en.wikipedia.org/wiki/Category:Volcanic_rocks

   Print/export Download as PDF; ... Lava rock buildings and structures ... Pages in category "Volcanic rocks" The following 68 pages are in this category, out of 68 ...

7. Scoria - Wikipedia

   en.wikipedia.org/wiki/Scoria

   Scoria is a pyroclastic, highly vesicular, dark-colored volcanic rock formed by ejection from a volcano as a molten blob and cooled in the air to form discrete grains called clasts. [ 1 ] [ 2 ] It is typically dark in color (brown, black or purplish-red), and basaltic or andesitic in composition.