Kråkesølv

Kråkesølv refers to a thin, flaky form of mica, often muscovite, that has a silvery or golden appearance. The term literally translates from Norwegian (and other Scandinavian languages) as "crow's silver." It's commonly found in metamorphic rocks like schists and gneisses, where it forms due to the metamorphism of clay minerals.

Kråkesølv is often mistaken for precious metals like silver or gold by inexperienced prospectors, leading to disappointment. Its flaky, easily crumbled texture and lack of metallic weight readily distinguish it from actual metals. While it lacks intrinsic monetary value, kråkesølv can add an attractive sparkle to rocks and soils and sometimes used in decorative applications, such as adding shimmer to paints or plasters.

The term also carries a figurative meaning, referring to something that appears valuable or precious but is, in reality, worthless or of little value – a deception or a false promise. This metaphorical usage draws on the visual similarity to silver and gold coupled with the actual lack of economic worth. Therefore, kråkesølv is also used to describe superficial beauty or appeal lacking true substance.