Especially appealing are a kermesite
from Que Que, Zimbabwe, and a stephanite from Arizpe, Sonora, Mexico with 3-cm crystals, donated by A.
Extraordinary kermesite crystals to 20 cm long are particularly spectacular, but specimens showing fluorite on stibnite, and specimens of rare species such as ottensite, are also of interest.
In the oxidation zone, cervantite, valentinite, stibiconite, kermesite and senarmontite are found to depths of about 100 meters.
Senarmontite and kermesite from Xikuangshan, although mentioned in the literature (Wu et al., 1990), have not been taken out in collector-quality specimens.
Many fabulous specimens of kermesite
, pyromorphite and mimetite were originally found in street markets and offered for sale by people who knew neither the mineral nor the locality.
The Pezinok mine, an antimony deposit mined since 1940, has yielded hundreds of specimens of some of the world's finest kermesite, excellent valentinite and stibnite, and rare species such as chapmanite and garavellite.
The Pezinok antimony mine in southwestern Slovakia is a relatively small ore deposit, but it is important for its unusually large and beautiful crystals of kermesite, a red antimony sulfoxide.
Of all the minerals found at the Lac Nicolet mine, the most famous and visually attractive is probably kermesite. This mineral occurs in a variety of habits and colors ranging from powdery red coatings on fracture surfaces to purplish red acicular crystals to 5 cm, crimson-red tufts of microcrystals and purplish red velvety crystal masses several centimeters across.
While kermesite is relatively abundant in the quartz-stibnite-antimony veins, it is virtually absent in the gudmundite-albite-dolomite assemblage.
Other fine antimony minerals found at the Cetine mine are cinnabar, cervantite, coquandite, kermesite
, onoratoite, mopungite, senarmontite, stibiconite and valentinite.
"Carthusian powder," produced by the Carthusian monks as an emetic and deobstruent, consisted essentially of crushed kermesite
. And in the New World, Aztec Emperor Montezuma built an extensive collection of plants, animals and minerals of pharmaceutical value before his death in 1520.
Several Stieglitz specimens have recently been identified in the Vienna Natural History Museum collection, including a native silver with acanthite from Annaberg, half of a galena-coated marcasite from the Albertine mine in the Bernburg area, and a fine kermesite
with stibnite from the Neue Hoffnung Gottes mine near Freiberg.