How do I identify Hercynite?

Hercynite can be identified by its hardness of 7.5 on the Mohs scale, Dark blue-green color. Look for these key characteristics when examining specimens.

What color is Hercynite?

Hercynite typically appears in Dark blue-green, yellow, brown. Color can vary depending on impurities and formation conditions.

How hard is Hercynite?

Hercynite has a hardness of 7.5 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.

How to Identify Hercynite | Properties, Meaning & Uses

What is Hercynite?

Hercynite is a spinel mineral with the formula FeAl2O4. It occurs in high-grade metamorphosed iron rich argillaceous sediments as well as in mafic and ultramafic igneous rocks. Due to its hardness it also is found in placers. It was first described in 1847 and its name originates from the Latin name for the Harz, Silva Hercynia, where the species was first found. Hercynite is a spinel of regular symmetry and normal cation distribution, but some disorder occurs in its structure. It consists of ferrous (Fe) ions and aluminium ions (Al), however some ferric ions (Fe) may be located in the structure of hercynite.

Hercynite Market Value Calculator

Estimate the market value of Hercynite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Hercynite Localities Map

See where Hercynite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.