Variety of Minerals (2)

Systematic name of hematite

Iron(III) oxide

Combination o elements for hematite

Iron and oxygen

Natural compounds

Combination of several elements

Calcium carbonate exist in various forms, colours and textures

Example: calcite, limestone, marble, chalk and coral reefs

Example of natural compound

Calcium carbonate

History of the discovery of gold

According to existing records, gold was discovered in its mineral element form in a cave in Spain in 40 000 BC

The first metals used by humans

According to existing records, the first metal used by humans is gold

Common name for iron(III) oxide

Hematite

Common name for cassiterite

Tin(IV) oxide

Common name for Silicon dioxide

Quartz