One white crystal group of the rare mineral queitite from the famous Tombstone (Arizona, United States of America). Quietite has only been found in a few localities worldwide. — Photo: David Hospital · CC BY-SA 4.0
Queitite
An extremely rare lead-zinc silicate-sulfate named for dealer Clive Queit, who collected the first specimens.
Intro adapted from Wikipedia (CC BY-SA).
Queitite is an IMA-recognized mineral species in the silicate class, with the chemical formula Zn₂Pb₄(Si₂O₇)(SiO₄)(SO₄).
It crystallizes in the monoclinic crystal system (space group P2_1).
Key properties: Mohs hardness 4; specific gravity 6.07; White streak; Greasy luster; optically biaxial.
IMA symbol Que, IMA status: approved, named in 1978.
On corroded sulfides in a partially oxidized lead ore from a dolostone-hosted hydrothermal polymetallic ore deposit (Tsumeb, Namibia).
It is found associated with Galena, sphalerite, tennantite, willemite, melanotekite, leadhillite, alamosite, larsenite, quartz (Tsumeb, Namibia); cerussite, leadhillite, susannite.
The name refers to Clive Sedric Queit, mineral dealer of Tsumeb, Namibia.