albitelabradorite

Albitelabradorite is a term sometimes used in gemstone circles to describe a variety of plagioclase feldspar that exhibits labradorescence similar to labradorite, with notable albite-rich intergrowths or lamellae. It is not widely recognized as a separate mineral species in formal classifications; rather, it reflects a compositional or textural variation within labradorite feldspar.

In mineralogical terms, albitelabradorite would be considered part of the plagioclase feldspar group, commonly represented by a solid-solution between albite (NaAlSi3O8) and anorthite (CaAl2Si2O8). Labradorite itself is a sodium–calcium plagioclase and displays exsolution lamellae of Albite and Anorthite that produce the characteristic iridescent play of color. An albitelabradorite description emphasizes albite-rich lamellae or higher albite content within the crystal structure, which can influence the strength and appearance of the labradorescent effect.

The most striking feature of this material is labradorescence: the surface or interior reflections that display flashes of blue, green, gold, or other colors as the stone is viewed from different angles. This optical effect arises from interference within the thin, cross-cut lamellae of different feldspar compositions.

Occurrences and sources include various igneous rocks where plagioclase feldspars crystallize, with notable labradorite deposits historically linked to Labrador, Canada, as well as other regions such as Finland (spectrolite), Madagascar, and Norway. In practice, albitelabradorite is used mainly as a decorative or gemstone material, cut as cabochons or faceted pieces to highlight the color play. Care is similar to other feldspar stones, with moderate hardness and reasonable resistance to wear, though prolonged exposure to strong heat or rapid temperature changes can affect surface luster.