Top 10 Rarest Gemstones in the world

8. Pink Star Diamond

The Pink Star Diamond, previously known as Steinmetz Pink, is the world’s most expensive gemstone. It’s a 59.60 carat gemstone that was mined in 1999. It is the largest vivid pink diamond ever graded by the GIA and was sold for $60 million at an auction in Hong Kong in 2017.

The buyer of the Pink Star Diamond later renamed it to CTF Pink. It’s worth a $1.2 million per carat, however, the record holder is the Blue Moon of Josephine, which is worth $4 million per carat.

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