group (secondary unit C6) was characterised by the presence of chabazite
, levyne, chabazite
-Ca and chabazite
Alteration of tuffitic strata exposed in a cliff above the village of Jedlka (SE of Decin) led to the origin of diagenetic analcime, phillipsite-Ca, and chabazite
(Novak and Cilek, 2001).
They are "heulandite" (heulandite sensu stricto and clinoptilolite), chabazite
, analcime, stilbite, barrerite, epistilbite, gmelinite, laumontite, natrolite, mesolite, scolecite, stellerite, tetranatrolite, thomsonite, and wairakite.
The only known specimen, found in a natrolite vein, shows 4 to 5-mm white prismatic crystals on chabazite
Hexagonal crystals of graphite 1 mm in diameter occur included in and on the surfaces of calcite, pyrite, muscovite and chabazite
Willimott (1884) reported chabazite
and natrolite from the Haldane Mine and stilbite from the Moore (Seybold) Mine, Gatineau Co.
In February 1890 Niven received "one of the best lots of minerals from Nova Scotia I have ever seen, comprising chabazite
, gmelinite, analcite, stilbite and heulandite," and also offered for sale an intriguing specimen: "the finest, largest and best rhodonite specimen that doubtless has ever been found," priced very high (for the times) at $500.
Other, less common mineral species that have been reported from the Klein Spitzkoppe occurrences include bixbyite, chabazite
, columbite, euxenite-(Y), gibbsite, nacrite, opal (hyalite), pyrophyllite, talc, ferberite and zircon.
Examples of first-rate Scottish zeolites in the two cases included very large specimens of basalt plates and open tubes lined with lustrous white stilbite "bowties" to 5 cm, thick coverages of lustrous white and colorless chabazite
rhombs to 3 cm on matrix, perfect glassy analcime trapezohedrons to 2.
Associated minerals are: microcline, aegirine, arfvedsonite, nepheline, eudialyte, albite, lorenzenite, loparite, aenigmatite, manganneptunite, murmanite, analcime, natrolite, stilbite, chabazite
, kuzmenkoite-Mn, nontronite, and others.
crystals from the deposit are white, translucent, and average several millimeters in size; they are commonly confused with dolomite.
Associated minerals are: muscovite, quartz, elbaite, topaz, milarite, calcite, chabazite
, stilbite-stellerite, rutile, fluorite, pyrrhotite, sphalerite and pyrite.