There were also annabergite
from Laurium, Greece; kermesite from Pezinok, Slovakia; sphalerite from Banska Stiavnica (Schemnitz), Slovakia; chalcocite and olivenite from Cornwall, England; some top-class vanadinite specimens of recent vintage from Mibladen, Morocco; and a few dozen of the new mimetites from Badenweiler.
Mineralization consists predominately of pitchblende or uraninite occurring as thin seams, bands and disseminations along bedding planes; tyuyamunite and cobalt bloom (erythrite) along some fractures; and to a lesser extent chalcopyrite, bornite, malachite, pyrite, annabergite
The Tynebottom mine has produced an interesting suite of nickel and cobalt-containing minerals including erythrite, safflorite, nickel-skullerudite, violarite, rammelsbergite, annabergite
, and some very attractive specimens of drusy calcite and "flowstone" colored pink to deep magenta by micro-inclusions of erythrite, or blue by copper salts.
In 1988 Lindsay Greenbank led a group from the British Geological Survey through the mine, and found a small cavity in the roof that yielded what is certainly the finest known annabergite
specimen from the Pennines (shown here).
Free-standing pseudooctahedral adamite crystals are rare and microscopically small; their typical associations are annabergite
, conichalcite, powellite and talmessite.
Green crusts of annabergite
have been recorded on the massive sulfides present in the mine (Petterd, 1910).
Most outstanding were a 350-gram specimen of Schneeberg silver, a fine cabinet-size skutterudite, fine annabergite
, chloanthite, tetrahedrite, a perfect little proustite group from Chanarcillo, and a well-formed, pale copper-red nickeline group containing 3-inch pyramidal crystals from Saxony.
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.
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.
Oxidation in the dump has produced stains and efflorescences of erythrite, tyrolite, annabergite
, malachite and, rarely, conichalcite and picropharmacolite.
Secondary nonmetallic minerals are: chlorargyrite, cholo-alite, keystoneite, mimetite, azurite, malachite, annabergite
, calcite, goethite, hematite and numerous unidentified phases.
Somewhat better known are bright apple-green annabergite
and cuprian adamite from Laurium, both occurring in glassy crusts of small crystals on matrix; spectacular specimens of these were here too.