What is called petrology?

Petrology is the study of rocks – igneous, metamorphic, and sedimentary – and the processes that form and transform them. Mineralogy is the study of the chemistry, crystal structure and physical properties of the mineral constituents of rocks.

What are the 8 colors of minerals?

Mineral colour

  • Red, blue, green, pink, purple, orange …
  • Minerals can be very colourful!
  • Some minerals are always the same colour.
  • But many minerals are not always the same colour.
  • So remember, while colour is an important property of a mineral, it can be misleading – never rely on colour to identify your mineral!

What is petrography the study of?

Petrography is the study of rocks in thin section by means of a petrographic microscope (i.e., an instrument that employs polarized light that vibrates in a single plane). Petrography is primarily concerned with the systematic classification and precise description of rocks.

What are the 2 main types of minerals?

There are two kinds of minerals: macrominerals and trace minerals. You need larger amounts of macrominerals. They include calcium, phosphorus, magnesium, sodium, potassium, chloride and sulfur.

What is petrology class 11?

Petrology: It is science of rocks. A petrologist studies rocks in all their aspects viz., mineral composition, texture, structure, origin, occurrence, alteration and relationship with other rocks.

Why is petrology important?

Petrology plays an important role in ascertaining the physical and chemical composition of rocks and the different conditions that influence their formation. Modern petrologists rely on knowledge in mineralogy to help in mapping and sampling of rocks.

What mineral smells like rotten eggs?

Hydrogen sulfide
Hydrogen sulfide smells like rotten eggs. Most sulphur on Earth is found in sulfide and sulfate minerals.

What mineral is GREY?

987 Gray Minerals Sorted By Color, Luster, and Streak Color

Mineral Name Color Streak Color
Plumbogummite # gray white
Triphylite # gray white, grayish
Arsenic # gray black
Cameronite gray black

Why is petrography important?

Archaeologists use petrography to identify mineral components in pottery. This information ties the artifacts to geological areas where the raw materials for the pottery were obtained. In addition to clay, potters often used rock fragments, usually called “temper” or “aplastics”, to modify the clay’s properties.

What is the difference between petrography and petrogenesis?

Petrography is a branch of petrology that focuses on the description and classification of rocks, especially by microscopic examination, while petrogenesis is a branch of petrology that focuses on the origin and formation of rocks, especially igneous rocks.