$750Median
350Sold (12 mo)
$50Last sale
Kolwezite & Malachite ps. Dolomite on Malachite/Chrysocolla ps. Baryte
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Malachite is found as both primary malachite, meaning that it formed the way you see it as malachite crystals; or as secondary malachite by replacement of a previous mineral, usually another copper species such as azurite or chrysocolla. Here the sharp crystals, in any case, are malachite - but not formed that way originally. Rather, they are replacements (pseudomorphs as we call them) of a previous generation of rhombohedral cobaltian dolomite. Also, these are not only malachite, but a mixture of malachite and kolwezite, according to analysis by our supplier. This specimen also has a few rounded aggregates of malachite and these tufts are simply malachite needles (primary). The malachite, stark and sparkling green, sits atop chrysocolla, which is ALSO a replacement of an earlier mineral species. These were analysed extensively Barcelona dealer Jordi Fabre (shortly before he retired and sold us a large part of his group of them in 2023). It became clear that this was much more interesting! In his own words: New at Sainte-Marie 2023 were specimens that represent, apart from its evident aesthetics and its world novelty, a complete treatise on mineralogy. The complicated sequence of events that produced these specimens is thought to have started with a cobalt-bearing Dolomite (which has since disappeared during the process), followed by successive substitutions in which more copper was added, leaving as a final result Kolwezite-Malachite in pseudomorphic shapes after crystals of the initial cobalt-bearing Dolomite. All of this complexity atop is perched upon a gorgeous carpet of blue: powder blue Chrysocolla pseudomorphs after Baryte, with a stage of Malachite growth, also pseudomorphic after Baryte. The discovery of this morphological and chemical complexity was published in the French magazine Le Règne Minéral (in January 2024).
Product details
SizeSmall Cabinet
Dimensions7.1 x 6.1 x 3.5 cm
Listed on01/27/2026
LocalityDR Congo, Lualaba, Tenke-Fungurume area
SKUSM25-210
Current owner
A
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Mineral guide
Learn about Baryte
collector's guide highlighting specimen value, top localities, crystal forms and color varieties, and care for display and storage.Regional guide
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