"Precious stones": a common expression, but what does it really mean? And is it still relevant today?

Diamonds, rubies, sapphires, emeralds... These are the "precious stones" according to historical classification.​ But today, other stones, such as tourmaline or spinel, can be just as rare and precious.​

Explore the history behind the term "precious stones" with Caroline Boneti, Gemologist and Lecturer at L'ÉCOLE, School of Jewelry Arts.​​