JORDANITE,DUFRENOYSITE (NEEDLE), BARYTE, WURTZITE and REALGAR (micro, miniature)

A very rare and older specimen from the Lengenbach Quarry.

Microscopic research reveals this specimen might contain

Dufrénoysite was first identified in the Lengenbach pit located in the Binn Valley of Switzerland's Valais canton. The mineral was described in 1845 by Augustin Alexis Damour, who named it in honor of the French geologist and mineralogist Armand Dufrénoy. In 1864, Julius Berendes further explored the properties of this mineral in his dissertation.

Wurtzite is a mineral composed of zinc and iron sulfide, represented by the chemical formula (Zn,Fe)S. It is a less common structural polymorph of sphalerite, with iron content that can vary up to eight percent. This mineral is trimorphous, existing alongside matraite and sphalerite. Wurtzite typically forms in hydrothermal deposits, often found in association with minerals such as sphalerite, pyrite, chalcopyrite, barite, and marcasite, and can also be located in low-temperature clay-ironstone concretions. First identified in 1861 from a site in the San José Mine in Oruro City, Bolivia, it was named in honor of the French chemist Charles-Adolphe Wurtz.