INDIAN GEOGRAPHY

Detailed explanation-1: -Caol is known as “Black Diamond". This is a fossil fuel which was formed millions of years ago when giant fern and swamps got buried under the layers of the earth. Coal is therefore referred to as “Buried sunshine". Electricity from coal is called “Thermal Power".

Detailed explanation-2: -Carbonado, commonly known as black diamond, is one of the toughest forms of natural diamond. It is an impure, high-density, micro-porous form of polycrystalline diamond consisting of diamond, graphite, and amorphous carbon, with minor crystalline precipitates filling pores and occasional reduced metal inclusions.

Detailed explanation-3: -Coal is also black and a common source of fuel but the term ‘black gold’ is not used for coal, it is used for petroleum.

Detailed explanation-4: -Natural Polycrystalline Atomic Structure (commonly called carbonados or carbonadoes): Carbonado is a polycrystalline mineral consisting of carbon, graphite and diamond with an amorphous (shapeless) atomic structure. So carbonados have no defined cleavage points like normal diamonds do.

Detailed explanation-5: -Anthracite derives from the Greek anthrakítēs (), literally “coal-like". Other terms which refer to anthracite are black coal, hard coal, stone coal, dark coal, coffee coal, blind coal (in Scotland), Kilkenny coal (in Ireland), crow coal or craw coal, and black diamond.