Question

Which of these pairs of minerals are always found in granites?

muscovite and calcite
quartz and orthoclase
hornblende and talc
augite and magnetite

Answer 1

Answer:

Granite is a light-colored igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below Earth's surface. Granite is composed mainly of quartz and feldspar with minor amounts of mica, amphiboles, and other minerals.... The minerals that are found in granite are primarily quartz, plagioclase feldspars, potassium or K-feldspars, hornblende and micas. Quartz is usually the last mineral to crystallize and fills in the extra space between the other minerals....

So, The Correct Option is:-

• Quartz and Orthoclase...
• Hornblende and Talc...

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Answer 2

Option B quartz and orthoclase is the correct answer.

• The most crucial mineral constituents of granite are 20–40% quartz, 50–80% K-feldspar is also known as orthoclase, Na-plagioclase and micas, primarily biotite and remarkable muscovite.
• This mineral configuration usually provides granite with red, pink, grey or white colour with shady mineral grains noticeable throughout the rock.
• The makers and architects frequently wrongly designed all the grain meddling igneous stones, particularly the granodiorite, diorite and gabbro by the phrase “granite”. The granite, granodiorite, diorite and gabbro are petrologically distinguished fundamentally with mineral configuration. The popular intentions of granite are constructing ornamental rocks, tiles, kitchen counters, historical and recent sculptures, engineering, curling and rock clambering.

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