QUICK FACTS
Name: Argyle diamond mine
Location: East Kimberley, Western Australia
Coordinates: -16.719356354801818, 128.38492713535314
Why it's incredible: The now-closed mine is the source of 90% of pink diamonds on Earth.
The Argyle mine held the biggest cache of pink diamonds ever discovered on Earth. Unlike blue and yellow diamonds, which are tinted by impurities like nitrogen and boron, pink diamonds get their color through geological processes that distort their crystalline structure. Pink diamonds are extremely rare and can fetch more than $2 million per carat (1 carat is equal to 0.2 grams, or 0.007 ounces), according to the International Gem Society.
