What is Andesite? Andesite is the name of a group of fine-grained, extrusive molten rocks that are typically light t…

The general principle works by extracting items of earth science info from many places, and extrapolating this over …

Granite minerals composition True granite (according to present day petrologic convention) includes each plagiocla…

What are geological maps? A geological map shows the distribution of different types of rock in an area. It usua…

As a sub discipline of geology, petrology seeks to understand the nature of jewels and their origin. Once  Gemst…

What's Marble?  Marble is a metamorphic gemstone that forms when limestone is subordinated to the heat and press…

This wordbook includes words normally accustomed describe the character of earthquakes, however they occur, and thei…

Absorption Spectrum :  Colours of sunshine least absorbed combining to provide the colour of the stone. The stone, …