Limestone classification

Limestone is a sedimentary rock composed largely of minerals calcite and aragonite which are different crystal forms of calcium carbonate

Limestone is made by precipitation of calcite dissolved in water and by deposition of marine organisms

Limestone is found in Egypt, Moroco, Israel, Canada, Croatia,France, Germany, Australia , New Zealand.

Limestone is yoused in crop fertilization also yoused for a portion of the Great Wall of China ,toothpaste ,food supplement as asourse of calsiom,certain cosmetics

Limestone is being used in toothpaste




Quartzite is a rock composed of firmly cemented Quartz grains most quartzite are metaphorphic but also exist sedementery quartzite.


Quartzite is made when Quartz-rich sandstone or chert has been exposed to high temperature and pressure.

Found in

Canada,Brazil,Germany,Madagascar,China,South Africa,and Venezuela.

Used in

Gemstone,computers,cellphones,televisions,radios,and electronics.

Quartzite used in phones



Obsidian is formed in the larges stage of volcanic eruption the silicas left over.

How it's formed

Formed by rapid cooling of viscous.

Where it's found


It is yoused in knifes,arrowheads,spear points,scrapers and othe weapons and tools

Obsidian used in knifes

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