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(1.5" x 2.0" Rock)
Sandstone is a clastic sedimentary rock made of quartz (silica).
Oil sandstone (bituminous sandstone) is a sandstone petroleum reservoir rock that contains
petroleum crude oil in its pores which originally migrated into it from its oil shale source rock.
To buy five oil sandstones for $14.95 (U.S.) which includes shipping to the U.S., click
this buy rocks link. For more information, click on this info@oilrocks.com email link.
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