Ingenuous Rock

Granite Rock:

Can be white, pink, or gray in color and at least 20% of quartz.


Forms when molten rock cools very rapidly.

Texture is glassy

Obsidian is a naturally occurring volcanic glass formed as an igneous.


Light colored.

Forms during explosive volcanic eruptions

Has a rough texture.


Is an igneous rock.

Volcanic rock of felsic.

Glassy texture.


is a common extrusive igneous rock formed from the rapid cooling of ballistic lava exposed at or very near the surface of a planet or moon.


Metamorphic Rock.


Green, purple, red, black, and brown colored.

The color is often determined by the amount of iron, and organic material present in the rock.

Schist: It has crystals

Foliate texture.


can be light or dark colored.

Rough textured.

Marble: Can be identified by its smooth glassy texture.


Very hard rock.

Mostly composed from sandstone.

Granular texture.



  • Lightweight: The weight is about 1/3 of a stone.
  • Low noise: Take a piece of amber and knock it careful against your teeth. I sounds hollow.
  • Warmth: Stone feels colder than amber. ...
  • Fire test: Amber burns with a reddish, sooty flame. ...
  • Softness: If you scratch amber with a knife so you get small slivers.


Generally hard.

Generally light coloured, grey through yellow.

Smooth to rough to touch,

Dependent on composition and or mode of formation.


  • Coal is made largely of carbon but also features other elements such as hydrogen,oxygen, sulfur and nitrogen.
  • Coal starts off as plant matter at the bottom of water. It is eventually covered and deeply buried by sediments where over time metamorphosis (a change in form) takes place.
  • Different types of coal contain different amounts of carbon. Lignite contains only around 60 to 75%, while anthracite contains more than 92%.
  • Anthracite is a hard, shiny, black coal that burns with a blue, smokeless flame. While most forms of coal are associated with sedimentary rock, anthracite undergoes metamorphism and is linked to metamorphic rocks.
  • Coal has long been burned to create electricity and heat. The use of coal is increasing every year, in 2006 the world consumed over 6,000,000,000,000 kilograms of coal!
  • Coal is the world’s largest source of energy for the production of electricity.


Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO. 2H2O. It can be used as a fertilizer, is the main constituent in many forms of plaster and is widely mined.


Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. The ratio of clay to other minerals is variable.[1] Shale is characterized by breaks along thin laminae or parallel layering or bedding less than one centimeter in thickness, called fissility.[1]Mudstones, on the other hand, are similar in composition but do not show the fissility.