This is my rocks and minerals website i will first tell you an introduction about them just in case you don't what they are. Rocks are not rare at all. Earth is made up of six sextillion tons of rocks! Did you no that rocks are made up of minerals and some can contain fossilized remains of plants and animals? Well, they are! Rocks fall into to three different groups: igneous rocks, metamorphic rocks, and sedimentary rocks. All these different types of rocks can tell us about Earth's past. They can tell us where huge inland seas were located, where rivers flowed, and what lived in these waters. Rocks vary in different color, texture, and hardness. We call these properties, which I'll tell you about later. The study of rocks is called petrology. Minerals also make rocks too! They occur naturally and are not man made. They do grow, but they are not living. Did you know that they're minerals in your toothpaste, radios, and even in your jewelry! Some rocks are only made of one mineral and others many.

These are some properties of rocks and minerals:
Color: The color of the rock or mineral.
Luster:Its shine.
Cleavage: The tendency of a mineral of rock to break evenly on a flat surface.
Fracture:The tendency of a rock or mineral to break unevenly along curved or irregular surfaces.
Hardness: A mineral or rocks resistance to being scratched.
Streak: The color of the rock or mineral in powder form.
Density:Ratio of mass to volume.
The quartz can be many different colors. On the Mohs scale it is a 7. They are used for radios, watches, and even pendants for good luck!
Did you no that halite is the natural form of salt? When you like it, it tastes like salt! It can be tons of colors and even multi-colored. Its streak is white and its chemical form is NaCl. We use halite to make salt.
Gypsum can be colorless, white, gray, brown, beige, orange, pink, yellow, light red, and green. Its streak is white. We use gypsum for the production of cement and fertilizer.
Sulfer is light in weight, soft, and it is very brittle. Pure sulfer is yellow or a yellow brown. Sulfer can be used for black powder, matches and explosives, and rubber. Did you no that it can dissolve in warm water and can crack in body heat! Sulfer is used to make fertilizer, too!
EFCycleP2.gifWe do not know which type of rock came first. It's almost like "What came first, the chicken or the egg?"Did you no that igneous rocks can be made into sedimentary or metamorphic rocks or vice versa? Well they can! The way they do this is called the rock cycle. The picture above explains how, but i will too.


First i'll start out with igneous rocks. Igneous means fire. We call the type of rocks igneous because they came from a volcano, so igneous rock means fire rock. These rocks are the most common material on Earth's crust. We can't always see igneous rocks because they're usually under a thin layer of sedimentary rock. Igneous rock is formed by liquid rock called magma. Most igneous rocks crystallize or solidify below Earth's surface. Igneous rocks can form from sedimentary rocks and metamorphic rocks. If it starts out as a sedimentary rock or a metamorphic rock then you need the rock to melt and make magma and then you need It to solidif

Igneous rock:
Granite is the best known igneous rock. It is made up of mostly quartz. It can be red, pink, gray, and white with dark mineral grains visible through out the whole rock. People can use granite to make countertops.
Black is the most common color of obsidian rock. It can also be brown and green. Did you know that some obsidian rocks can be two different colors swirled together? Obsidian is also used for cutting and some people used to use obsidian to make arrowheads!
Pumice is usually a creme color. It was formed by gases escaping, which causes lava to foam up. Also, pumice can float on water! Pumice is used for construction and plaster.
Basalt is dark colored and can show bubble and flow patterns. It is also found on the moon! We use basalt for construction and for floor tiles.
Sedimentary rocks cover up much of North America. These rocks form when mud, silt, gravel. or sand is subjected to pressure, heat , or chemical change. Sand becomes sandstone, gravel becomes conglomerate, and mud and clay become shale. Those are types of clastic sedimentary rock which means they formed from particles of rock. Nonclastic rocks are formed by chemical precipitation or by organic activity. Some examples are limestone, gypsum, and coal. Sedimentary rock is formed when there's firstly, erosion. After erosion sediments need to form. Then, when there's sediments, you need pressure. That is also how metamorphic rocks and igneous rocks form sedimentary rocks.
Sedimentary rock:
Limestone is composed by calcium carbonate and can be formed by fossils! It can also form from evaporation and precipitation. We use limestone for the help of construction.
This rock is a clastic sedimentary rock known as, conglomerate. This rock shown in the picture is made of chert, limestone, sand, and clay. Some of these rocks can be colorful. Conglomerate is not used a lot in commercial uses, but sometimes it is crushed to make aggregate.
Sandstone is a clastic rock. It is made up of mostly sand. The color of shale can be red, brown, green, yellow, gray, and white. We use sandstone for domestic and commercial use.
Shale is made up of, mostly, sand, clay, quartz, and calcite. It can be various colors. We use shale for shingles on roofs.
Metamorphic rocks were originally either sedimentary or igneous rocks. They were changed later. Metamorphis means a noticable or complete change of character, appearance, or condition. For an example, almost like a catipillar going through metamorphosis. Meta-sedimentary rocks were formed from sedimentary rocks and meta-igneous rocks were formed from igneous rocks. Many metamorphic rocks contain flat minerals, such as mica. Metamorphic rocks form from heat and compression or pressure. That is also how igneous and sedimentary become a metamorphic rock.
Metamorphic rocks:
Formed from shale. When it splits, it splits into thin pieces. The color of slate is mostly gray, however it can be puple or green. We use slate for roofing and floor tiles. Slate has a dull luster.
Marble is made from limestone or dolomite. It has a shiney luster. The color of marble ranges from purest of white and black and warmer colors. This rock is used for buildings, countertops, and even sculptures! Marble will dissolve in acidic fluids.
Gneiss is like schist but less strongly layered, so it's usually tougher. Consists of varying concentrations of biotite, garnet, hornblende,mica and other minerals. It is usd as facing stone on some buildings.
Phyllite is produced mainly of slate. Though, it does have a glossy luster caused by the mineral mica. It is a medium-gray or greenish color. we use this rock for countertops and also for some patios.
We use rocks and minerals for many different things but some common things minerals are used for is fertilizer, pendants, salt, and everyday items such as toothpaste, radios and even watches. Common uses of rocks is they're used for construction, countertops, roofs, floor tiles, and even statues.I also listed what specific minerals and rocks were uesd for up above.
Suggested Website: has more information than just rocks and minerals.