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Schists are a family of rocks, which constitute a group of medium-grade metamorphic rocks, mainly composed of lamellar minerals such as micas, chlorite, talc, hornblende, graphite. Their chemical formulae vary, depending on the main mineral they contain.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoGneiss is a form of metamorphic rock consisting of light and dark silicates, due to which it has an appearance of banding. It can be formed from diorite or granite combined with a number of minerals, bonded to it at extremely high temperatures (e.g. 600 degrees and above). The possible added minerals in the structure of gneiss include feldspar (potassium and sodium varieties), quartz, gabbro, shale, hornblende, biotite and muscovite.
Wiki User
∙ 11y agofeldspar, quartz, mica, and hornblende.
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What mineral family can the Mica mineral change to when Gneiss is formed?
pegmatite
Which mineral can be found in granite andesite gneiss and hornfels?
biotite mica
Does gneiss have cleavage?
I dont think so because a rock can not have cleavage, but a mineral can
Does gneiss have fracture?
The term is not applicable here. The terms fracture and cleavage refer to the manner in which minerals break. Gneiss is not a mineral, it is a rock composed of multiple minerals.
Which mineral is commonly found in the three metamorphic rocks slate schist and gneiss?
quartz
What is gneiss mineral group?
Gneiss is a rock, not a mineral.
What is a mineral that is after phyllite and before gneiss?
Not a mineral but a rock. Schist comes asfter phyllite ut before gneiss.
What is gneiss and schist?
Both are foliated metamorphic rocks in which individual minerals can be seen with the naked eye. The difference is that gneiss is generally more coarsely crystalline and has color banding and schist smells bad.
Why can the composition of gneiss vary but overall texture cannot?
The texture defines the gneiss. If it varies, it's not gneiss. I'm studying the same thing! -8th Grader! :D
What mineral family can the Mica mineral change to when Gneiss is formed?
pegmatite
What type of crystals does gneiss rock have?
Gneiss usually consists of visible crystals of aligned mineral assemblages.
Are Gneiss crystalline?
Yes, the gneiss rocks are usually crystalline. The gneiss rocks are foliated or banded metamorphic rocks that have the same composition as the granite.
What does the Canadian Shield contain much of?
Gneiss and mineral deposits.
Which mineral can be found in granite andesite gneiss and hornfels?
biotite mica
What mineral composition?
Each known mineral has a specific chemical composition.
What are the properties of gneiss?
gneiss has many properties depending on the type of gneiss it is but some common properties are fine or coarse grains, metamorphic "bands" on the rock, and it's composition which is feldspar,quartz, mica, and hornblende.
Does gneiss have cleavage?
I dont think so because a rock can not have cleavage, but a mineral can
