These two observations can be reconciled considering that soil waters are usually much closer to saturation with K-feldspar than with albite, and owing to these distinct thermodynamic affinities, the dissolution rates of K-feldspar in soils are strongly decreased with respect to those of albite. This natural mineral specimen was found in a tourmaline bearing pegmatite in Minas Gerais, Brazil. Comments. Albite is a rock forming mineral in pegmatites and the characteristic, interlocking blady variety known as cleavelandite is a sign of the presence of possible pockets. Albite is found throughout the world, with major locations in the Alps, Urals, Harz Mountains, France, Norway, and the U.S. (Maine, Virginia, Colorado). Because albite is the last of the feldspars to crystallize from molten rock, it may often be found with other rare minerals. Pericline is elongated and twinned along the b-axis and … The mineral is translucent to opaque with a pearly luster. In pegmatites, albite forms crystals up to about 8cm in pegmatite which can sometimes be gemmy. Although usually white, the brittle, glassy crystals … This is a variety of Albite, known as pericline, taking its name from the Greek word, periklinis, or inclined on all sides (Mindat). The albite-anorthite system. Uses: Albite feldspar is an important ingredient in some building and ornamental stones, notably granites, some of the finest of which owe their beauty to feldspar crystals . The variety of albite called cleavelandite typically has thin curved intergrown blades that are white, cream colored, tan or frequently a pale blue color. Albite is a widely distributed white feldspar commonly found in granites, syenites, rhyolites, and trachytes, as well as pegmatites and spillites. Pericline is the variety of Albite with a glazed porcelain-like luster and milky white color. Albite is a plagioclase feldspar mineral.It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. Albite also forms very fine crystals in vuggy alkali foidic syenites. Albite is a helpful crystal to use as it stimulates the brain, which can enhance your memory and boost you mentally.. Translucent albite is sometimes found that is colored a rich green by inclusions of chrome-rich jadeite. Clevelandite is a blade shaped lamellar variety of white albite often found in pegmatite pockets associated with tourmaline, beryl, lepidolite and other pocket minerals. It is a common constituent in felsic rocks. Albite is a widely distributed white feldspar commonly found in granites, syenites, rhyolites, and trachytes, as well as pegmatites and spillites. Fine sharp crystals of albite can measure up to 20 cm. It has a number of useful effects within the crown chakra and the brain, including helping you to think more clearly and logically. It is a very attractive decorator mineral specimen! Albite, common feldspar mineral, a sodium aluminosilicate (NaAlSi 3 O 8) that occurs most widely in pegmatites and felsic igneous rocks such as granites.It may also be found in low-grade metamorphic rocks and as authigenic albite in certain sedimentary varieties. Albite mineral Britannica. These include olivine, pyroxene, amphibole, biotite, and plagioclase feldspars. Most of the common minerals found in igneous rocks are solid-solution phases. Albite Helps Your Memory! Albite is the sodium end member of the plagioclase series, and is commonly found in pegmatites. Because albite is the last of the feldspars to crystallize from molten rock, it may often be found with other rare minerals. Crystallization behaviour is illustrated best by using the NaAlSi 3 O 8 (albite or Ab)–CaAl 2 Si 2 O 8 (anorthite or An) plagioclase system shown in Figure 4. Facetable albite from Madagascar has indices: a = 1.530-1.531; β= 1.532-1.533; γ= 1.539-1.540; birefringence 0.009-0.010; density 2.62. Albite is sometimes intergrown with emerald, especially in the strange hexagonal skeletal crystals known as trapiche emeralds. The albite matrix is a mass of intergrown triclinic albite crystals with a small amount of quartz. Written By Liz Oakes. The pure albite endmember has the formula Na Al Si 3 O 8.It is a tectosilicate.Its color is usually pure white, hence its name from Latin albus. Activates The Brain & Boosts You Mentally.