Hardness and Strength of Pumice. Rarely, pumice can erupt from gas-charged magmas of basaltic or andesitic composition. Pumice stones as used in beauty salons are generally high in silica and low in iron and magnesium. They are lighter colored, of lower density, and more highly cellular than are scoria and cinder. Texture: aphanitic and vesicular (contains abundant large gas cavities) Composition: intermediate (andesitic) to mafic (basaltic) Color: black or dark brown. The physical properties of Pumice rock are vital in determining its Pumice Texture and Pumice Uses. Coal. It is also employed as a lightweight aggregate in precast masonry units, poured concrete, insulation and acoustic tile, and plaster. Cooling Rate: rapid, extrusive. Get to know information about Pumice texture and also know all about Pumice Color. PUMICE. There are various physical properties of Pumice like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it. Hardness and Strength of Pumice. Pumice is a low-density, light-colored felsic volcanic rock. Quartzite. Density. Composition of Pumice. Origin: Extrusive/Volcanic Get to know information about Pumice texture and also know all about Pumice Color. The physical properties of Pumice depend on its formation. It commonly forms as a frothy upper surface on silicic lavas. Home. Pumice is pyroclastic igneous Other Characteristics: vesicular like pumice, but denser and darker with larger vesicles. Pumice is composed of highly microvesicular glass pyroclastic with very thin, translucent bubble walls of extrusive igneous rock. Igneous Rocks-Shonkinite. It is stable and can be reused practically indefinitely. Sandstone. Metamorphic Rocks + Schist. Basaltic Trachyandesite. Physical properties of rocks play an important role in determining its applications in various fields. Pumice is created when super-heated, highly pressurized rock is … Most pumice erupts from magmas that are highly charged with gas and have a rhyolitic composition. 1.4 Pumice and Pumicite. Intrusive Equivalent: diorite or gabbro. Chemical Composition of Pumice, Expressed as Oxides (%) Oxide SiO 2 Al 2 O 3 CaO MgO Fe 2 O 3 Na 2 O K 2 O; Percent: 70–75: 12–14: 1–3: 0.1–0.6: 0.8–2.0: 3–6: 4–5: Sterilization, Reuse, and Waste Disposal—Pumice is biologically inert and contains no pathogens or weeds (Challinor, 1996). A.L. It is commonly pale in color, ranging from white, cream, blue or … It is typically light colored. Scoria is another vesicular volcanic rock that differs from pumice in having larger vesicles, thicker vesicle walls and being dark colored and denser. Fossil Rocks + Novaculite. Pumice, a very porous, frothlike volcanic glass that has long been used as an abrasive in cleaning, polishing, and scouring compounds. It is commonly,but not exclusively of silicic or felsic to intermediate in composition (e.g., rhyolitic, dacitic, andesite, pantellerite, phonolite, trachyte), but basaltic and other compositions are known. Pumice is very lightweight. It has very thin, translucent bubble walls of extrusive igneous rock. This is due to the air bubbles in it, created as gasses departed during the formation process. Texture: aphanitic and vesicular (contains abundant small gas cavities) Composition: felsic (rhyolitic) Color: white to light-gray or light-tan Cooling Rate: rapid, extrusive; Intrusive Equivalent: granite Texture and Composition of Pumice and Scoria Provide New Insights into the Dynamics of Explosive Eruptions at Campi Flegrei (Italy) The physical properties of Pumice rock are vital in determining its Pumice Texture and Pumice Uses. Marble. Comendite. The physical properties of Pumice depend on its formation. Bush, in Encyclopedia of Materials: Science and Technology, 2001. Pumice and pumicite are used both as structural lightweight aggregates and as ultralightweight aggregates. Pumice has a chemical composition similar to that of obsidian, or volcanic glass. Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals.