Aug 13 2017

What is phyllite used for #marble, #encyclopedia, #encyclopaedia, #britannica, #article

Donate # Marble marble, granular limestone or dolomite (i.e. rock composed of calcium-magnesium carbonate) that has been recrystallized under the influence of heat, pressure, and aqueous solutions. Commercially, it includes all decorative calcium-rich rocks that can be polished, as well as certain serpentines (verd antiques). Marble quarrying at Carrara, Italy Encyclop√¶dia Britannica, Inc. Marble quarrying and fabrication near Velingrad, Bulg. Encyclop√¶dia Britannica, Inc. Petrographically marbles are massive rather than thin-layered and consist of a mosaic of calcite grains that rarely show any traces of crystalline form under the microscope. They are traversed by minute cracks that accord with the rhombohedral …