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Metamorphic Rock

January 14, 2020

Metamorphic rock is one of the three main groups in the rock cycle and includes popular building and flooring stones such as marble and Slate. Metamorphic rock is formed by the changing of a pre-existing rock, known as a protolith, into a new rock. The protolith, meaning ‘first stone’ in greek, can be igneous, sedimentary or another metamorphic rock. These changes happen without […]

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Igneous Rock

January 14, 2020

Igneous rock is sometimes referred to as fire rock from its Latin translation ‘ignis’ which means ‘pertaining to fire’. This is an appropriate translation as igneous rock is derived from the cooling and crystallization of magma or lava. Magma is a naturally occurring molten rock material which comes from deep within the Earth’s surface. Magma’s […]

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Sedimentary Rock

January 14, 2020

Sedimentary rock is one of the three main groups in the rock cycle and includes common building and flooring stones such as limestone, sandstone and travertine. It is generally softer and more porous than igneous and metamorphic rock which is what makes it a popular material in construction. Sedimentary rock covers as much as 80% of the Earth’s surface […]

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The Rock Cycle

January 13, 2020

When scientists talk about the rock cycle, they are describing a slow, continuing process of rocks transforming from one type to another in a repeating sequence. In order to understand the process fully in detail we first need to be clear about the terms ‘rock’, ‘stone’, ‘minerals’ and ‘elements’. In simple terms a rock can […]

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Moh’s Scale of Hardness

January 13, 2020

The universal scale used to test the hardness of a mineral or rock is known as Moh’s scale. It was devised by the Austrian mineralogist Frederick Moh in the early 1800’s as a crude but practical method of comparing scratch resistance. Hardness can be tested by comparing resistance to fracture, indentation or breakage however Moh’s […]

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