Malachite

Five samples. Dark green botryoidal Malachite with a silky lustre. Malachite (Cu2CO3(OH)2) can be emerald-green, grass-green or dark in green in colour. Lustre can be adamantine, silky or dull and streak is light green. Hardness is 3 1/2 to 4 and cleavage is perfect in one direction crosswise. Malachite usually occurs as radial, fibrous, botryoidal, stalactitic, incrusting or earthy form. Malachite can also occurs as crystals (rare) and be long or short prismatic forms.