Question

what is mineral and explain physical properties of Quartz and Mica​

Answer 1

Answer:

A mineral is a naturally occurring inorganic solid, with a definite chemical composition, and an ordered atomic arrangement. This may seem a bit of a mouthful, but if you break it down it becomes simpler. Minerals are naturally occurring. They are not made by humans.

Answer 2

What are minerals:

Minerals are solid substances that are present in nature and can be made of one element or more elements combined together (chemical compounds).

Gold, Silver and carbon are elements that form minerals on their own. They are called native elements. Instead, ordinary kitchen salt is a chemical compound that is called rock salt, which is a mineral formed of sodium and chlorine ions.

PHYSICAL PROPERTIES OF QUARTZ AND MICA

QUARTZ :

Chemical Classification Silicate

Color: Quartz occurs in virtually every color. Common colors are clear, white, gray, purple, yellow, brown, black, pink, green, red.

Streak: Colorless (harder than the streak plate)

Luster : Vitreous

Diaphaneity Transparent to translucent

Cleavage None – typically breaks with a conchoidal fracture

Mohs Hardness : 7

Specific Gravity : 2.6 to 2.7

MICA :

Color: purple, rosy, silver, gray (lepidolite); dark green, brown, black (biotite); yellowish-brown, green-white (phlogopite); colorless, transparent (muscovite)

Cleavage:Almost perfect

Fracture :flaky

Mohs scale hardness :2.5–4 (lepidolite); 2.5–3 biotite; 2.5–3 phlogopite; 2–2.5 muscovite

Luster : pearly, vitreous

Streak: White, colourless

Specific gravity: 2.8–3.0