Western Australia’s Argyle Mine, known for its rare pink diamonds, may have formed around 1.3 billion years ago as a result of a tectonic collision followed by the breakup of a supercontinent, according to new research. The mine, which produced more colored diamonds than any other place on Earth, has fascinated scientists for decades. The pink hue of the diamonds is due to tectonic pressure that alters the stones’ crystal structure, unlocking hidden colors. Additionally, a volcanic eruption brought the diamonds from deep within the Earth’s mantle to the surface. The study’s findings provide important context for understanding the volcanic activity at Argyle.
https://www.scientificamerican.com/article/pink-diamonds-erupted-to-earths-surface-after-early-supercontinents-breakup/