Feldspar

Feldspar is not a separate mineral, but a large and extremely important group of rock-forming minerals, constituting about 60% of the earth's crust. These are the real architects of rocks! The group includes numerous varieties, the most famous of which are combined into two main subgroups: potassium feldspars (Orthoclase, Microcline, Sanidine) and plagioclases (a series from Albite to Anorthite, which includes Oligoclase, Andesine, Labradorite).

Feldspars are striking in their variety of colors: from classic white, pink and gray to yellow, greenish and even blue shades. Some varieties exhibit fascinating optical effects: bright iridescence (labradorescence) in Labradorite, gentle moonlight (adularescence) in Moonstone (Adular), and sparkling Schiller effect in Sunstone (a variety of oligoclase or orthoclase). These minerals occur mainly in igneous (granites, basalts) and metamorphic (gneisses, schists) rocks, as well as in pegmatites, where large and well-formed crystals are often found. Feldspar deposits are widespread throughout the world, including Ukraine, where there are significant deposits, in particular decorative Labradorite and granites rich in feldspar.

Due to their abundance, variety of shapes, colors and unique optical properties, feldspars are key objects for mineralogical collections - from classic crystals to spectacular specimens with iridescence or adularescence.

Some varieties are highly valued in jewelry. They are also widely used in industry (ceramics, glass production) and as a facing and decorative stone. Feldspar is not just a mineral, it is a fundamental part of geology and a fascinating world for collectors and connoisseurs of natural beauty.