It is often carved into talismans or worn as jewelry ... Quartz is known as the “Master Healer” and is often used to amplify ...

Turned into jewelry and decorative objects since ... an extraordinary piece of naturally sculpted spherical pyrite perched on a bed of quartz from Romania; a Mexican opal with rhyolite nodules ...

In medieval times, pyrite was even used in flint locks for the first firearms, later to be replaced by the harder flint (a quartz variety). In the 16th century, the name became restricted to ...