Detailed information
Species
Chrysocolla, ps. after Malachite, ps. after Azurite
Dimensions
55 x 95 x 43
mm
Weight
112 g
Locality
Tenke-Fungurume area Kolwezi mining district Lualaba, DR Congo
Condition
No recorded repairs
Who doesn't love a wonderful baby blue colour? This cabinet-sized specimen from the Tenke-Fungurume area in the Kolwezi mining district, Democratic Republic of Congo (DRC) is a very striking colour, and one which is not often seen in mineral specimens. Not only is it colourful and beautiful, but is has a fine geochemical story to tell. An attractive array of pale blue bladed crystals rise up from matrix. These are blades of Chrysocolla - an amorphous copper silicate - coated with a fine layer of colourless Quartz crystals. Of course, Chrysocolla does not form crystals, let alone freestanding bladed crystals. Instead, the Chrysocolla is a pseudomorph, or replacement, of Malachite, but Malachite does not form bladed crystals like these either! So, the Malachite was also a pseudomorph, but probably after bladed Azurite, meaning that this is Quartz coating Chrysocolla pseudomorphs after Malachite pseudomorphs after Azurite. Wonderfully complex and strikingly beautiful.