ex. Charlie Key
This remarkable specimen clearly shows embedded crystals of green Cuprosklodowskite altering to Uranophane , yellow and altered by the time it reaches the protected shallow cavity in the center of the piece. Most unusual!
This remarkable specimen iis the richest, most colorful large example of this classic material I have yet seen. I am told they were found in the 1950s, primarily. This comes out of a small midwestern museum collection, where it has been sheltered all these years, and the pockets of crystals are in incredible condition. I have never seen the mineral in such thick, velvety layers of long crystals before. I believe it to be quite significant , thus, both for the locality AND for the species
A vug contains elongate crystals of brilliant color and lustre. The thin acicular yellow crystals are Uranophane and the more flattened, lathelike crystals are the Guillemanite . ANALYZED
Superb, unusually large Demesmaekerite crystals with micro-crystalline yellow mineral in association. (6 mm crystal). At a guess, the micro-sized acicular yellow crystals are almost certainly Uranophane but this has not been analyzed to prove it and they may be somethign more rare
ex. John White
A hair-like cluster of acicular uranophane crystals, perched nicely in the middle of a matrix plate . This is classic, now rare, material from this old uranium mine in Bancroft area.
ex. John White
A rare example of beautifully crystallized, acicular uranophane from NEW MEXICO. At first glance, this looks like the Canadian material above. However, it is from a small and hard to get locality. Specimens are few, and I have seen only 3-4 for sale in the last decade
ex. John White
Two hair-like clusters of acicular uranophane crystals, perched nicelyon a matrix plate . This is classic, now rare, material from this old uranium mine in Bancroft area.
Sharp, extremely gemmy crystals of this rare uranium species to 3 mm on contrasting quartz matrix. Just a beautiful piece, and extremely fine of the crystallography here . The species normally occurs as acicular needles, not as 3-D crystals with real terminations! 5.7 x 3.4 x 2.1 cm
5.7 x 5.0 x 4.4 cm. Microcrystalline uranophane [not analysed, kasolite was also suggested], in a protected vug of malachite and ore. Ex. Charlie Key Collection.
5.9 x 3.3 x 2.5 cm. An EXCELLENT and SHOWY combination specimen from the famed Musonoi Mine of Zaire. Lustrous, banded and radiating needles of grass-green cuprosklodowskite RICHLY cover matrix. The accompanying yellow needles are uranophane pseudomorphs after cuprosklodowskite needles! A very uncommon and highly desirable occurrence.
6.1 x 5.9 x 2.5 cm. Pastel-yellow and green radial tufts of acicular uranophane richly line a very well-placed vug in matrix on this excellent specimen from the well-known Wolsendorf fluorite district of Bavaria, Germany. The uranophane is nicely complimented by a couple of brown, radioactive baryte crystals. There is even a vug lined with hematite-tinted quartz crystals on the bottom of the piece, as a bonus. Ex. Charles Hansen Collection.
6.2 x 5.8 x 3.1 cm. This large, rich specimen has three species for which this is the type locality: Masuyite (in red spherical aggregates), Fourmarierite (dark red/umber crystals underlying the Becquerelite and embedded in the matrix), and superb, large sprays of Becquerelite with crystals to a whopping 5mm. The matrix is uraninite.
5.8 x 4.7 x 3.8 cm. The kamotoite-(Y) are the vibrant yellow crystalline sprays with individual flat-laying crystals to 6 or 7 mm, accented by microcrystalline uranophane around their periphery and by a small bit of subcrystalline Astrocyanite-(Ce) (blue). TYPE LOCALITY for both Kamotoite-(Y) and Astrocyanite-(Ce).
3.9 x 3.8 x 2.3 cm. Relatively sharp pseudomorphed crystals to about 1 cm, of Uranophane pseudo. Uraninite from this unusual location. Nice for the replacement from any locality. Ex. Philadelphia Academy of Sciences Collection.
6.5 x 2.5 x 1.2 cm. A rare large plate of well-crystallized Becquerelite crystals up to 1.5 mm on a bed of Uranophane. Some small rosettes of Studtite are dispersed upon the Becquerelite. Some small red hexagonal Fourmarierite crystals are associated as well as beige Rutherfordine sprays. Collected at least 50 years ago.
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