Is anthracite coal foliated?

No, because it is a mono substance rock formed in either metamorphic conditions or near metamorphic conditions. Neither pure quartzites or pure marbles carry foliation either. "Non-foliated textures are identified by their lack of planar character.

Further identification of non-foliated rocks is dependent on the composition of the minerals or components in the rock. Anthracite coal is similar to bituminous coal. Both are black in colour, and is composed of carbon.

Anthracite coal is generally shiny in appearance and breaks with a conchoidal fracture (broken glass also shows this type of fracture). Metaconglomerate is composed of pebbles and gravel that have been flattened due to directed pressure. Quartzite is composed of quartz sand grains.

Quartz has a hardness of 7, which makes it difficult to scratch. Marble is composed of calcite and will readily react to a small drop of HCl. More.

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