UD. Riau Teknik


Selling Cheap Pumice from UD. Riau Teknik in Pekanbaru. Pumice is a textural term for volcanic rock which is a densely foamy lava composed of extremely microvesicular glass pyroclastics with walls of igneous, extrusive volcanic rock that is bubbly, very thin and translucent. Pumice is a common product of volcanic eruptions (formation of Plinius and ignimbrit) and generally forms zones at the top of silicate lava.
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