Jasper is an opaque variety of chalcedony, typically encountered in shades of mottled yellow-red-brown due to various iron oxides. It often exhibits bands or spots. Its name is derived from the Greek word “Iaspis”, which is mentioned in works of Theophrastus and the Bible. What makes this mineral interesting are its streaks and layers, which sometimes form impressive psychedelic patterns. These patterns have been grouped and assigned various poetic names.
Quartz is one of the most common minerals, making up almost 12% of the Earth’s crust It is also known as silicon dioxide and is encountered in sedimentary and volcanic rocks. When found at high temperature during the last phase of its precipitation, quartz crystallizes within only a few months. It is mined in Brazil, Japan, America and Switzerland.