Geologist classify metamorphic rocks according to the arrangement of the grains that make up the rocks and also it either being foliated or nonfoliated

yes it is many people think it is an igneous rock because it is red

well technically the first diamonds were made from magma before the earth was populated with people, but now the only way to make crystals(not diamonds) is from burning graphite, which is the only other substance completely made from carbon, like diamonds. so yes technically crystals are made from magma when it is spewed up from volcanos.

Phyllite is an example of a metamorphic rock which may have formed from slate, another metamorphic rock.

Any rock can become a metamorphic rock. To become a metamorphic rock the rock must undergo heat and/or pressure, but not so much that the rock melts. Should the rock melt it would become an igneous rock.

in the 50s

metamorphic rock is made by heat and pressure on layers of sediments and in creates a smooth rock such as granite.

There are different types of rocks depending on where they formed or why they formed.There are : Sedimentary rocks,Igneous rocks, Metamorphic rocks.Now,the rocks are formed due to various reasons like they were disintegrated due to strong wind or they were effected by running water or was exposed to high sunlight.

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.

Schist rock is a very common form of metamorphosed rock.

It was originally a sedimentary rock, then buried and heated, and maybe sheared as well. Exhibits re-mineralization of its component molecules.

It has a distinct foliation, and may exhibit folding from subsequent tectonic processes.

From increased pressure and/or heat. Fluid removal results in hydrous mineral destruction and non-hydrous mineral creation, resulting in rock of a different mineralogy.

A metamorphic rock can be further metamorphosed by additional heat and/or pressure into a rock with a higher degree of metamorphism. An example of this would be the metamorphic rock slate changing into the metamorphic rock phyllite.

It breaks down and the cycle starts again

the name quartzite came from the German word quartzit and quartzite's crystal shape is a 6 sided prism

Depends on which one. Diamond is a metamorphosed coal/carbon that is the hardest natural substance known. Marble is metamorphosed limestone that is much softer. It's safe to say that all metamorphosed rocks are harder than they were in their pre-metamorphosed form.

marble, quartzite, cataclasite, metabasalt

Tiger's Eye, sometimes called crocidolite, is a form of quartz and can be found almost world-wide including Brazil, Russia, Japan, Scotland (UK) and SW Africa.

It is a primary color, found in the rainbow, and easy to create with natural materials such as indigo, etc.

Nonfoliated metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure).

Quartzite, marble, and metabasalt are non-foliated metamorphic rocks..................................... i like dots

Quartzite

Nonfoliated metamorphic rocks such as marble and quartzite derived their metamorphism more from heat than from directional pressure. Foliations form at right angles to intense directional pressures. Nonfoliated metamorphic rocks like quartzite and marble are mainly single-mineralic in composition, and would therefore not tend to display layering.

Pressure, Heat, Chemically active fluids (water and CO2 in rocks), Time(obviously), and the parent rock composition.