The specimens consist of blue micro-spheres of nevadaite associated with microcrystals of fluellite and hewettite
. They are from an already mined-out locality--the Gold Quarry mine, Eureka County, Nevada (see the article in the Mineralogical Record, Vol.
Goldquarryite is a latestage supergene mineral associated with opal, carbonate-fluorapatite and hewettite, on a host rock composed principally of brecciated and hydrothermally rounded jasperoid fragments which have been lightly cemented by late-stage silicification.
Hewettite, in radiating sprays (to 10 mm) of lustrous maroon-red fibrous crystals, and goldquarryite were the last minerals to form, and oc cur as isolated clusters on and between breccia fragments; the two species do not occur in immediate association and their paragenetic relationship is not known.
Associated minerals are: pascoite, sherwoodite, selenium, bariandite, devilline, rossite, hewettite
, carnotite, clausthalite, coffinite, tyuyamunite, uraninite, corvusite, montroseite, roscoelite, galena, pyrite and tennantite.
Among those identified are burangaite (second world occurrence), corderoite, fervanite, fluellite, hewettite, heyite, kazakhstanite, mandarinoite, richellite, schubuelite (second world occurrence), sincosite, tinticite (in crystals!) and many others.
Radiating sprays of brilliant maroon-red hewettite crystals, lustrous golden yellow fluellite crystals, and dense mats of intergrown selenium crystals are only a few of the interesting discoveries made recently.
Associated (later) minerals include variscite, fluellite, leucophosphite, unknown #1, hewettite, tyuyamunite, torbernite and tiemannite/ corderoite, commonly all on the same specimen.
At location 1 on the 5,425 bench, lustrous, colorless calcite rhombs to 0.2 mm occur rarely as an associated mineral with wavellite, fluellite, aluminian strengite and hewettite.
The species occurs as bright orange-red pulverulent patches to 1 mm on colorless gypsum overgrowths on hewettite crystals.
Associated crystallized species may include wavellite, hewettite, tyuyamunite, torbernite, leucophosphite, anatase, tinticite, phosphofibrite, blue unknown #1 and strengitevariscite.
Hewettite [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]