Entity: TOURMALINE
Tourmaline is a mineral of variable color valued as a gem when transparent and cut. It is a crystalline silicate mineral group containing boron compounded with elements such as aluminum, iron, magnesium, sodium, lithium, or potassium.
TOURMALINE
Etymology
Tourmaline comes from the Sinhalese (Sri Lanka) words 'tura mali' meaning 'unknown gemstones of mixed colors'.
Definition
Tourmaline is a mineral of variable color that consists of a complex borosilicate and is valued as a gem when transparent and cut.
Historical Context
Tourmaline has been known for centuries and has been used for various purposes, including as a gemstone and in electronic instrumentation.
Cultural Significance
Colored tourmaline crystals were grouped together in parcels in Sri Lanka and exported to Europe, highlighting its cultural significance.
Related Concepts
Tourmaline is a crystalline silicate mineral group containing boron compounded with elements such as aluminum, iron, magnesium, sodium, lithium, or potassium.
See Also
A mineral of variable color that consists of a complex borosilicate and is valued as a gem when transparent and cut.