Small orange to yellow kasolite crystals, very aesthetic under magnification. They are disposed on a sandstone matrix with malachite. A Musonoi classic.

These specimens come from the type locality for kolwezite, a copper-cobalt carbonate. Most of the "kolwezite" pieces seen on the market don't have the 1:1 Cu:Co ratio required to call them that; they usually have a 2:1 Cu:Co ratio. Of all the ones I've analyzed (and there are quite a few), even the olive-green ones maintain this ratio. In this case, we can say, to be honest, they're cobalt-rich malachite specimens. Even so, the specimens are very aesthetically pleasing. If I ever find a 1:1 Cu:Co kolwezite, I'll probably find the grail...

75 €

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These specimens come from the type locality for kolwezite, a copper-cobalt carbonate. Most of the "kolwezite" pieces seen on the market don't have the 1:1 Cu:Co ratio required to call them that; they usually have a 2:1 Cu:Co ratio. Of all the ones I've analyzed (and there are quite a few), even the olive-green ones maintain this ratio. In this case, we can say, to be honest, they're cobalt-rich malachite specimens. Even so, the specimens are very aesthetically pleasing. If I ever find a 1:1 Cu:Co kolwezite, I'll probably find the grail...

110 €

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Globular aggregates of kolwezite, light to intense green in color. They contrast on a matrix with cobalt-bearing calcite crystals.

Colourful specimen of cobaltoan dolomite, with intense color, brilliance and translucent crystals. Very aesthetic. From the J. Astor collection (Barcelona).

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by guilleminite crystals of yellowish color. The matrix is partially covered by brilliant malachite. A aesthetic sample from a classic locality, to be observed with attention.

Kasolite is one of my favorite species. In this sample (from Dr. Viñals, Barcelona) we can enjoy several vugs with lanceolated kasolite crystals. With the orange color, some transparent and isolated, some forming aggregates. Contarsting on the green matrix.

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by wulfenite crystals of orange color. The matrix is partially covered by brilliant and transparent torbernite thin tabular crystals. With some malachite. A aesthetic sample from a classic locality, to be observed with attention, nowadays it is very difficult to see good samples like these.

In my opinion, among all known radioactive minerals, kasolite is the most aesthetic. It presents forms of elongated to tabular prisms, very well defined and sharp, many of them doubly terminated and of intense yellow color, even with some transparency. It is accompanied by wulfenite crystals of orange color. The matrix is partially covered by brilliant and transparent torbernite thin tabular crystals. With some malachite. A aesthetic sample from a classic locality, to be observed with attention, nowadays it is very difficult to see good samples like these.

Fantastic cuprosklodowskite specimen formed by several thin acicular prismatic crystals with a brilliant green to yellow color, very brilliant and transparent. Crystals have grown in cavities covered by dark green malachite. In one of them we can enjoy a great aesthetic group of tabular barite crystals, with toasted honey color and transparent, on which a beautiful acicular aggregate of cuprosklodowskite has grown. A small beauty.
This speciemn of uranyl and copper silicate is from Musonoi, not Kalongwe. A complete sample.