cyanotrichite


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cyanotrichite

[‚sī·ə′nä·trə‚kīt]
(mineralogy)
Cu4 Al2(SO4)(OH)12·2H2O A bright-blue or sky-blue mineral consisting of a hydrous basic copper aluminum sulfate.
References in periodicals archive ?
Perhaps next to the cyanotrichite is an incredible, drool-provoking azurite rose from Bisbee, Arizona that you would murder your grandmother for, which you would like to fondle for a minute or two, even if you could never hope to own anything so fine.
These include such minerals as cyanotrichite, okenite, and some mesolites, whose crystals, if wet, will typically mat down and stick together.
Others species, like cyanotrichite, produce crystals so delicate that you can't touch them without damaging them.
It is surprising to see Fairfield phosphates at this early date, as well as cyanotrichite and brochantite from the Last Chance mine (today known as the Grandview mine) in the Grand Canyon, Arizona.
Cyanotrichite [Cu.sub.4.sup.2+][Al.sub.2](S[O.sub.4])(OH)[.sub.12] x 2[H.sub.2]O
In 2003, a few dealers in Changsha and Guilin offered specimens showing needle-like crystals of a blue mineral thought to be cyanotrichite. Further testing established finally that this secondary mineral was the rare carbonate-cyanotrichite (Niedermayr, 2004).
Another prominent dealer on the Italian scene, Lino Caserini (linocase@tin.it), also had good Chinese material, in particular some very fine cyanotrichite specimens, with delicate sprays of acicular crystals up to 3 mm on matrix, from Dachang, Guizhou, China.
How about top-quality specimens of leadhillite, cerussite, linarite, turquoise, vanadinite, smithsonite, zunyite, cyanotrichite and hematite?
Cyanotrichite is an incredibly delicate, but beautiful blue mineral that is rarely collected or preserved in an undamaged state.
Fine specimens of spangolite, brochantite, creedite, cyanotrichite, fluorite, linarite, tsumebite and wulfenite have been recovered.
Yet, ask mineral collectors and the words that come to mind when the Grand Canyon is mentioned are cyanotrichite and the Grandview mine.
Lustrous, bladed crystals to 6 mm were found with malachite, brochantite, cyanotrichite and dodecahedral cuprite crystals to 3 mm.