Labradorite has inherited its name from Labrador a place in Canada where it originates from. Labradorite is basically feldspar mineral. It is an intermediate to calcic member of the plagioclase series. Its occurrence is clear, white to grey blocky to lath shaped grains in common mafic igneous rocks. It is also found in metamorphic amphibolites and in some sediment as detrital component. Labradorite is credited to have an optical effect Labradorescence on its name. Labradorite when displaying iridescent optical effect is called Labradorescence. In Labradorescence light is peculiarly reflected from submicroscopical planes oriented in one direction. The gemstones varieties of Labradorite showing high degree of Labradorescence are known as spectrolite.