Malachite is a common copper mineral with a wide occurrence and brilliant green color. It is often banded in appearance and is usually found as crusts or crystal clusters. Can be found as a pseudomorph after azurite crystals.
Cu2(CO3)(OH)2; Hardness: 3.5-4; monoclinic
Goethite is the yellow- or reddish-brown alpha polymorph of iron(III) oxide-hydroxide, typically occurring in low-temperature environments. Goethite has been well known since ancient times for its use as the pigment brown ochre. The mineral was named after the Johann Wolfgang von Goethe
α-Fe3+O(OH); Hardness 5 - 5½; Orthorhombic