schorl
/ʃɔːl
/noun [mass noun]
A black iron-rich variety of tourmaline.Sprays of black schorl in quartz are some of its most sought-after minerals....
- Here it was associated with quartz, albite, schorl, muscovite, and microcline in the intermediate zone.
- Most have some collectible minerals such as beryl, garnet, and schorl, and a few have lithium minerals.
Origin
Late 18th century: from German Schörl, of unknown origin.