All these new finds were from Morocco, including a few of the erythrites
, some nice roselite from the Agoudal quarry, Bou Azzer district, some cute loose clusters of azurite from Kerouchen, and a few acanthites from Imiter.
Minerals occurring in this leached zone included goethite, hematite, jarosite, erythrite, native bismuth, bieberite, heterogenite, nontronite and pitticite.
In the Blackbird mine, rose-red fibrous coatings of erythrite along seams and cracks were found in a black tourmaline-quartz rock (Ream, 2004).
These classic localities have produced the world's finest specimens of erythrite, roselite, roselite-beta, talmessite, wendwilsonite, skutterudite and gersdorffite.
For a long time the tribal Berbers of the region around Bou Azzer had known of the outcropping arsenic-rich ore veins and of their cobalt arsenate minerals, especially erythrite, whose beautiful violet-red color seized their attention.
Good specimens of erythrite
and clinoclase microcrystals were discovered in the Freirina area near Vallenar in 2000.
He does make exceptions: recently, for example, he acquired some extraordinary thumbnails of Freiberg silver, N'Chwaning mine rhodochrosite, Moroccan erythrite
, and even Dal'negorsk fluorite (the exquisite "invisible" octahedron on sphalerite pictured here), all of which also exist in world-class miniatures and cabinet specimens.
Once through Bideaux Minerals I had supplied to Ed an erythrite
from Schneeberg, Germany.
siderite, tetrahedrite after bournonite ("stylotypite"); see Viboras Magarinas Ferberite, geocronite Maragua Cassiterite; see Santiaguillo, Vetillas, Cerro Malmisa Marcamarcani Arsenopyrite, tellurian bismite, (formerly San bismuth, bismuthinite, Baldomero) bismutoferrite, erythrite
, joseite, lollingite, skutterudite ("smaltite") Marcocoya Copper after aragonite Margarita Vivianite, wolframite Maria Francisca Cylindrite, (*)(?
He was offering azurite, erythrite
and (of course) vanadinite at prices starting around $13.
Other minerals in the dump material are: cobaltaustinite, scorodite, bariumpharmacosiderite, olivenite, conichalcite, erythrite
, arsenjosiderite, mimetite, beudantite, silver, bismuth, acanthite, galena, pyrite and skutterudite.
These include: annabergite, aragonite, argentopentlandite (Sirka, 1988), brochantite, chlorite (group), covellite, devilline, erythrite
, gadolinite, gahnite, goethite, gold-silver (electrum), illite, kaolinite, langite, malachite, montmorillonite, natrojarosite, naumannite (Frigstad, 1972), palygorskite, posnjakite, scheelite, sepiolite (van der Wel, 1972), stilpnomelane, sulfur, tetrahedrite and tremolite-actinolite.
The Moroccan erythrite
situation seems not to have evolved since Denver: available erythrite
specimens clearly are leftovers from then (but still just as beautiful as they were then), handled by Francois Lietard, Horst Burkard, and occasional others.
There is a paddleboard describing erythrite
, annabergite and manganite as products of "mixed metals," but without any explanation of what that means, and I am not sure which metals are mixed in manganite.
occurs as a rare secondary mineral in the Bor pit.