Granite (igneous rock)

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See the vast collection of Ornamental Stones from China. Code Number: 2034 Measurements: 8 x 4 x 2 cm Type: Igneous rock formed deep within the Earth's crust, known as a plutonic rock. Description: Granites are extremely common types of rocks that form when magma cools slowly below the Earth's surface. They appear light in color and are primarily composed of Quartz and Alkali-feldspar, with small amounts of plagioclase present. These rocks may also contain mafic minerals such as ferromagnesian minerals and accessory minerals. Essential minerals found in Granites include quartz, potassic feldspar (orthoclase, microcline), ± plagioclase, and biotite. Accessory minerals often present are magnetite, ilmenite, apatite, pyrite, zircon, tourmaline, etc. Learn more at: http://geology.uaic.ro/muzee/mineralogie/ Concept and 3D modeling by dr. Andrei Ionut APOPEI