earthstory: Malachite mushroomMost malachite is of secondary origin, when primary deposits of copper
earthstory: Malachite mushroomMost malachite is of secondary origin, when primary deposits of copper sulphide are altered by hydrothermal fluids, but in some locations it occurs as a primary mineral. The Democratic Republic of Congo in Africa’s copper belt was the source of this 6.4cm x 7.4cm x 4.3cm specimen, which grew as a stalactite of small fibrous crystals.Image credit: http://crystalclassics.co.uk/ -- source link