Marble Silica Content

38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32 various carbonates mgco3 and others.

Marble silica content.

Silica content is generally lower in natural stone products. Marble is commonly used for sculpture and as a building material. Marble is a metamorphic rock composed of recrystallized carbonate minerals most commonly calcite or dolomite marble is typically not foliated although there are exceptions in geology the term marble refers to metamorphosed limestone but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Exposure to silica which is a component found in marble dust is one risk factor for developing scleroderma.

Calcium based stones including limestone and certain varieties of marble e g calcite dolomite and onyx contain little or no silica. In contrast granite can contain up to 45 50 silica. Though granite marble and engineered stone all can produce harmful silica dust when cut ground or polished the artificial stone typically contains much more silica says a cdc researcher. Petrographically marbles are massive rather than thin layered and consist of a.

Occupational safety and health administration. Practical reports on rheumatic and musculoskeletal diseases a case of localized scleroderma in a sculptor and his wife. Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques. The table below describes typical silica quartz content of common natural and engineered.