Garden Quartz Tumblestone 30-40mm Large, Brazil (100g) NETT

Chlorite is commonly found in igneous rocks as an alteration product of mafic minerals such as pyroxene amphibole and biotite. Chlorite is a common mineral associated with hydrothermal ore deposits and commonly occurs with epidote sericite adularia and sulphide minerals. Chlorite is also a common metamorphic mineral. Quartz is a form of silica and is the most common mineral the earth's crust. As such Quartz and Quartz crystals can be found in large quantities the world over. Regardless of this fact, very clear and large Quartz crystals are highly prized by collectors.