Nice metallic crystal of parapierrotite a very rare thallium sulphosalt from the type locality in Allchar in a matrix of realgar. Parapierrotite has only been found in 5 localities worldwide. From: Crven Dol Mine, Allchar, Roszdan, Macedonia (former Yugoslav Republic). — Photo: David Hospital · CC BY-SA 4.0
Parapierrotite
Parapierrotite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula TlSb₅S₈.
It crystallizes in the monoclinic crystal system (space group Pn).
Key properties: Mohs hardness 2.5–3; specific gravity 5.07; Semimetallic luster.
IMA symbol Ppie, IMA status: approved, named in 1974.
Of hydrothermal origin, in cavities in realgar (Alšar, Macedonia).
It is found associated with Realgar (Alšar, Macedonia); avicennite (Lookout Pass, Utah, USA).
The name refers to its relation to pierrotite.