Tourmaline is also piezoelectric. That means it exhibits electrical conductivity when pressure is applied. The crystal axes in this gem mineral have different properties at the opposite ends of the polar axis. If pressure is exerted at these ends, electricity can flow creating opposite positive and negative ends.
The military and aerospace industry know this. Tourmaline has been used in pressure gauges since World War II, when the blast pressure of the first atomic bomb was measured.
So if this gem of a jewel generates a dynamic response with you, just blame it on its p-i-e-z-o . . . oh never mind. Just enjoy it.
Dior tourmaline and diamond ring