Malachite, botryoidal, Zaire M894 - Malachite, botryoidal, Zaire. Nice dark green Malachite specimens with a bubbly surface, called botryoidal, at one end. Looks like a bunch of grapes at one end. Nice specimens. Malachite is: Basic Copper Carbonate. Hardness 3-1/5 to 4. Malachite is used as an ore of copper and as a semi-precious gemstone.  From Zaire. Weight .10 pounds   Price: $4.95 per piece (You can always remove items from your cart later if you wish)