Linarite,copper lead sulphide, PbCuSO4(OH)2 and Malachite, copper carbonate, Cu2CO3(OH)2. Geufron mine, Central Wales Orefield. Quartz rich host rock with an encrustation of malachite overlying deep blue linarite. Most of the linarite is an encrustation in the form of tightly compacted crystals. Several radiating sprays of bladed crystals about 0.5mm in length can be seen with high magnification.