Question

III. Which of the pictures below are examples of rock-forming minerals?

b. olivine
a. Quartz
c. feldspar
d. marble​

Answer 1

the answer is option b quartz

Answer 2

a)quartz, b)olivine, and c)Feldspars,other rock-forming minerals

Explanation:

Quartz

• One of the most frequent minerals in the Earth's crust is quartz.
• Quartz refers to a specific chemical compound (silicon dioxide, or silica, SiO2) with a specific crystalline form as a mineral name (hexagonal)

olivine

• Olivine is a collection of rock-forming minerals found in mafic and ultramafic igneous rocks such as basalt, gabbro, dunite, diabase, and peridotite. The majority of them are green in color.

feldspar

• Feldspars are a group of aluminum tectosilicate minerals that form rocks and contain sodium, calcium, potassium, or barium.

• Plagioclase (sodium-calcium) feldspars and alkali (potassium-sodium) feldspars are the most prevalent members of the feldspar group.
• feldspars can be found in a wide variety of sedimentary rocks.

marble​

• Buildings and monuments, interior decorating, statuary, table tops, and novelties are all made of marble.
• Their most essential characteristics are color and look.