Question

Which of these minerals is not found in granite????
a) mica , b) feldspar, c) calcite, d) quartz​

Answer 1

c) Calcite is a mineral that is not found in granite.

Explanation:

• Granite is a light-colored, coarse-grained igneous rock that is primarily made of feldspars and quartz, with tiny amounts of mica and amphibole minerals.
• Granite is a plutonic rock in which alkali feldspar accounts for 65 to 90% of the total feldspar content and quartz makes up 10 to 50% of the felsic components.
• Granite, unlike marble, limestone, and travertine, does not include the mineral Calcite. The mineral Calcite is what causes etch marks on natural stone surfaces when it comes into contact with acids.

Answer 2

Option c) Calcite is not found in granite.

Explanation:

• Granite is a conglomeration of minerals and rocks,

• It primarily contains quartz, potassium or K-feldspars, mica, amphiboles, and other trace minerals.

• The composition of quartz ($10-50$%), potassium feldspar, and sodium feldspar make up more than $80$% of the rock.

• The chemical composition is generally $70-77$% silica, $11-12$% alumina, $3-5$% potassium oxide, $3-5$% soda, $1$% lime, $2-3$% total iron, and less than $1$% of magnesia and titania.