K-Feldspar var: Adularia (twins) with ''Byssolite'' inclusions

Item Description

A fine, large, impressive and frankly, rarely seen Adularia specimen from this "Alpine-type" locality in the high mountains of Pakistan. These elusive and high quality pieces compare quite favorably to the classic and highly desirable specimens from the Swiss Alps. Adularia is defined on mindat.org as a, "more ordered low-temperature variety of Orthoclase or partially disordered Microcline". The crystals are almost always more angular and compressed than higher temperature Feldspar (specifically K-Feldspar in this case). This piece features several sharp, well-formed, white, tapered blocky twinned crystals of this variety of K-Feldspar, which have a muted blue/green hue in areas due to inclusions of "Byssolite" (likely some kind of Amphibole species) but the original white color of the Adularia crystals is still the predominant hue. No major damage that I can find on the display side, but a few tiny nicks can be seen here and there. The crystals have very good luster for the material, they can often be dull, but these have a distinct vitreous quality on the surface. If you're a fan of Feldspars, Alpine ("Alpine-type") minerals, or just interesting crystal morphology, do not miss out on this attractive specimen from this Pakistani locale. This particular piece dates back to the early 2000s.
Ex Herb Obodda specimen, valued $1,800.