This Specimen has been sold.
2.1" Large Lazurite Crystals in Calcite Matrix - Afghanistan
This wonderful specimen contains multiple lazurite crystals and pyrite crystals that are partially exposed from a 2.1" wide marble/calcite matrix. This specimen was collected from the Sar-e-Sang District of Afghanistan, an area well known for its phenomenal lazurite crystals. The largest lazurite crystal is 1.45" wide.
Lazurite is a vibrant blue mineral of the tectosilicates group, with the chemical formula Na6Ca2Al6Si6O24S2. It is the blue component in Lapis Lazuli and is most often found in massive forms, though in some cases it does form individual crystals. There is a location in Afghanistan that is well known for producing phenomenal lazurite crystals in a marble matrix. These specimens are highly sought after by both amateur and expert mineral collectors.
The mineral pyrite or iron pyrite is commonly referred to as Fool's Gold because its metallic luster and pale brass-yellow hue give it a superficial resemblance to gold. In the old mining days, pyrite was sometimes mistaken for gold. Pyrite is the most common of the sulfide minerals with the chemical formula FeS2. Pyrite crystals occur in many shapes and habits, including cubes of all sizes, penetration twin cubes, pyritohedral clusters and as small druzy crystals that can exhibit a beautiful glistening effect.