Rock (geology) – Harry & Co Jewellery

Introduction and Formation of Rocks

Rocks are naturally occurring solid masses or aggregates of minerals or mineraloid matter.
They form the Earth's outer solid layer, the crust, and most of its interior.
Rocks are categorized based on the minerals included, chemical composition, and formation process.
The study of rocks involves subdisciplines of geology like petrology and mineralogy.
It can include the study of rocks on other celestial objects.
Rocks are grouped into three main types: igneous, sedimentary, and metamorphic.
Igneous rocks form from the cooling of magma or lava.
Sedimentary rocks form through the weathering, transport, and deposition of existing rocks.
Metamorphic rocks form when existing rocks are subjected to high pressures and temperatures.
The rock cycle describes the transformation of rocks from one type to another.

Humans have used rocks since the Stone Age, developing stone tools and using them in construction.
Mining is done to extract rocks and minerals, including metals.
Modern technology has allowed the development of man-made rocks like concrete.
Rocks have contributed to the understanding of Earth's history, human history, and technological advancements.
Rocks play a crucial role in engineering and infrastructure development.
Geology is the study of Earth and its components, including rocks.
Petrology focuses on the character and origin of rocks.
Mineralogy studies the mineral components that make up rocks.
The study of rocks has contributed to the understanding of Earth's history and plate tectonics.
It has also played a role in archaeological understanding and the development of engineering and technology.

Rocks are primarily composed of grains of minerals or mineraloids.
Silicate minerals, which include silica tetrahedra, are abundant in most rocks.
Rocks are classified based on characteristics like mineral and chemical composition, permeability, and texture.
The rock cycle explains the transformation of rocks into igneous, sedimentary, and metamorphic types.
There are no strict boundaries between different types of rocks, as they can transition gradually.

Metamorphic rocks are formed by subjecting any rock type to different temperature and pressure conditions.
Process is called metamorphism.
Results in profound change in physical properties and chemistry.
Temperatures and pressures required are higher than those at Earth's surface.
Commonly occurs when continental plates collide.
Mars, Venus, and Mercury are composed of rock.
Natural satellites, asteroids, and meteoroids are also made of rock.
Meteorites provide evidence of extraterrestrial rocks.
Asteroid rocks can be brought to Earth through space missions.
Lunar rocks and Martian rocks have been studied.
Rock has been used by humans for at least 2.5 million years.
Lithic technology is one of the oldest and continuously used technologies.
Mining rock for its metal content has been important for human advancement.
Different regions have different metals available from the rock.
Cultural and technological development of humans has been influenced by the use of rock.
Synthetic or restructured rock formed by human activity.
Concrete is a human-made rock developed since Ancient Rome.
Rock can be modified with other substances to develop new forms.
Artificial stone, such as Coade stone, has been developed.
Proposed as a fourth class of rocks alongside igneous, sedimentary, and metamorphic.

Rock varies greatly in strength, from quartzites to friable sedimentary rock.
Egyptians quarried soft rock for construction as early as 4000 BCE.
Romans used tuff, a soft rock, for many buildings and bridges.
Limestone was widely used in construction in the Middle Ages.
Stone has been a popular building material throughout history.
Mining is the extraction of valuable minerals or geological materials from the earth.
Materials recovered include base metals, precious metals, coal, and more.
Mining has been done since prehistoric times.
Modern mining involves prospecting, extraction, and reclamation of land.
Mining can have negative impacts on the environment and regulations are in place to manage them.
Stone tools have been used for millions of years.
Stone Age was a period of widespread stone tool usage.
Early Stone Age tools were simple implements like hammerstones and flakes.
Middle Stone Age tools had sharpened points and distinct cultural identities.
Stone tools were superseded by copper and bronze tools with the development of metallurgy.

Reference	URL
Glossary	https://harryandcojewellery.com.au/blogs/glossary/rock-geology
Wikipedia	http://en.wikipedia.org/wiki/Rock_(geology)
Wikidata	https://www.wikidata.org/wiki/Q8063
Knowledge Graph	https://www.google.com/search?kgmid=/m/01cbzq