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gneiss, schist, slate
Slate is made up of mostly of quartz and muscovite, often with some biotite, chlorite, and/or hematite. Small quantities of apatite, graphite, kaolin, magnetite, tourmaline, and zircon may also be present in measureable amounts.
Non foliated rocks, such as marble, form from limestone, a common type of sedimentary rock. Foliated rocks form from metamorphic or igneous rocks. Non Foliated rocks are more brittle than foliated rocks making them more susceptible to breakage.
Slate is a clay mineral rich metamorphic rock. Sandstone is a sedimentary rock typically composed of cemented small grains of the mineral quartz. The two are very different rocks, both in composition and processes of formation.
Slate pencils in different regions are made from different substances. Slate pencils in India(more specifically southern India) are made from a type of sedimentary rock known as Shale, which is composed of mud that is a mixture of clay minerals (kaolinite, montmorillonite and illite) and small quantities of other minerals especially quartz and calcite. The ratio of clay to the other minerals gives the shale its colour. Shale from which slate pencils are made, are light gray in colour. Slate pencils in certain other parts of India are made from soft Soapstone, which is a metamorphic rock, composed dominantly of talc.
Slate is mainly composed of the minerals quartz and muscovite or illite
Agate,highly tinted quartz,and slate.
quartz, slate, and some marble
No, inorganic as it consists mainly of quartz and other minerals
I think it is either slate or quartz
quartz
Mud or clay-sized particles. Quartz, feldspars.
Slate is a metamorphic rock. Slate is actually shale that had low heat and not very much pressure put on it. Slate is mostly formed in mountain areas. It takes thousands of years for slate to change. Slate can be any color but is mostly found in gray or black. When it is broken, it splits into layers. It can have quartz, muscovite, hematite, graphite, and other minerals in it.
gneiss, schist, slate
Slate is made up of mostly of quartz and muscovite, often with some biotite, chlorite, and/or hematite. Small quantities of apatite, graphite, kaolin, magnetite, tourmaline, and zircon may also be present in measureable amounts.
The most common metermorphic rocks are : Marble, quartz, slate, phyllite, schist, geniss.
Non foliated rocks, such as marble, form from limestone, a common type of sedimentary rock. Foliated rocks form from metamorphic or igneous rocks. Non Foliated rocks are more brittle than foliated rocks making them more susceptible to breakage.