Information about Theisite

Theisite is a rare secondary mineral typically found as aggregated, flattened crystals or spherical clusters with a turquoise-blue to pale greenish-blue colour. It exhibits a pearly lustre and is translucent.

Uses and History

Due to its rarity and distinctive appearance, Theisite is primarily of interest to mineral collectors and researchers. It has no significant industrial applications.

Theisite was first discovered by geologist Nicholas J. Theis at a uranium prospect near Durango, Colorado, USA.

Mineralogy

Hazards and Warnings

Toxic mineral: contains arsenic. 

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis. When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

Translations

Further Reading / External Links

• https://www.mindat.org/min-3934.html
• https://webmineral.com/data/Theisite.shtml
• https://rruff.info/doclib/hom/theisite.pdf