World's Most Expensive Diamond

Mouawad Diamond Necklace



Price: $12 million
Carats: 70 (for the largest stone)
This necklace of white and colored diamonds was once displayed at London’s Natural History Museum and is currently owned by the Robert Mouawad as part of his collection housed in Geneva, Switzerland, which contains his higher-end pieces. The largest jewel in the necklace is a 70-carat white sparkler.