Crystals in pegmatites form through the slow cooling and crystallization of magma that is rich in water and volatile components. As the magma cools, the high concentration of minerals leads to the growth of large, well-formed crystals, often containing rare elements. The unique conditions in pegmatites, including increased temperature and pressure, allow for the formation of complex mineral structures. These environments typically have a lower viscosity, facilitating the movement of ions and enhancing crystal growth.
Teardrop-shaped bodies with large crystals, often referred to as "pegmatites," form when magma cools slowly, allowing large crystals, such as gemstones, to develop. These formations typically occur in the final stages of magma crystallization, where the temperature and pressure conditions create an environment conducive to the growth of sizable mineral crystals. Pegmatites are commonly found in granitic environments and can contain rare minerals and gemstones due to the concentration of elements during crystallization.
Pegmatites are igneous rocks that form from the crystallization of magma that is rich in water and volatile components, leading to the growth of large crystals. The unique conditions during their formation result in the presence of rare minerals and elements, such as lithium, beryllium, and tantalum. These crystals often exhibit a distinct zonation, with more complex and larger crystals forming in the center of the pegmatite. The slow cooling process allows for the development of well-formed, often beautifully colored crystals, which are of significant interest to mineral collectors and the mining industry.
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
Both plutons and pegmatites are formed from the slow cooling of molten rock beneath the Earth's surface. This slow cooling allows for the formation of large mineral crystals. Additionally, both plutons and pegmatites can contain a variety of minerals, often including rare or uncommon ones due to the unique conditions of their formation.
Sapphires are mined from http://www.answers.com/topic/alluvium deposits or from primary underground workings. They form in rocks called pegmatites
slow cooling of gaseous magma
Veins of extremely coarse-grained igneous rocks are called pegmatites. These veins form from the crystallization of mineral-rich magma, resulting in very large crystals due to slow cooling and high water content. Pegmatites are commonly found in association with granitic rocks.
Teardrop-shaped bodies with large crystals, often referred to as "pegmatites," form when magma cools slowly, allowing large crystals, such as gemstones, to develop. These formations typically occur in the final stages of magma crystallization, where the temperature and pressure conditions create an environment conducive to the growth of sizable mineral crystals. Pegmatites are commonly found in granitic environments and can contain rare minerals and gemstones due to the concentration of elements during crystallization.
Pegmatites are igneous rocks that form from the crystallization of magma that is rich in water and volatile components, leading to the growth of large crystals. The unique conditions during their formation result in the presence of rare minerals and elements, such as lithium, beryllium, and tantalum. These crystals often exhibit a distinct zonation, with more complex and larger crystals forming in the center of the pegmatite. The slow cooling process allows for the development of well-formed, often beautifully colored crystals, which are of significant interest to mineral collectors and the mining industry.
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
i think the answer is pegmatites or something... i just googled it myself your corect it is pegmatites
Veins of extremely coarse-grained igneous rocks are referred to as pegmatites. These veins are formed from the last minerals to crystallize in a cooling magma, resulting in very large crystals. Pegmatites can contain economically valuable minerals such as lithium, beryllium, and rare earth elements.
pegmatites
Both plutons and pegmatites are formed from the slow cooling of molten rock beneath the Earth's surface. This slow cooling allows for the formation of large mineral crystals. Additionally, both plutons and pegmatites can contain a variety of minerals, often including rare or uncommon ones due to the unique conditions of their formation.
They are associated with the late stages of granite intrusions and the minerals formed in pegmatites literally had the time to enjoy the benefits of a slow crystallization process from a rich chemical stew produced by the cooling granite. For an alternate hypothesis, see the link below.
Yes. Salts can form crystals (salt crystals).
Mineral specimens with very large crystals most likely formed in environments with slow cooling rates and sufficient space for crystal growth, such as pegmatites or hydrothermal veins. These conditions allow for the growth of larger crystals due to reduced competition for space and slower precipitation rates.