Girl's best friend indeed: 100-carat 'perfect' diamond up for auction

Story highlights

  • 100-carat emerald-cut diamond is flawless, Sotheby's says
  • Stone is expected to sell for up to $25 million

(CNN)Still searching for the perfect gift for your sweetie for Valentine's Day?

A 100-carat perfect diamond isn't expected to go up for auction until April, but your intended isn't likely to care about receiving a belated gift of this size and cut.
The 100.20-carat, D color (meaning it is colorless), internally flawless stone is one of just five comparable quality diamonds over 100 carats, a release from Sotheby's auction said, and is "the largest perfect diamond with a classic Emerald-cut ever to be offered at auction."
    Are diamonds forever?
    Are diamonds forever?

      JUST WATCHED

      Are diamonds forever?

    MUST WATCH

    Are diamonds forever? 03:35
    The original rough diamond was more than 200 carats and was mined in South Africa. The current owner, who wishes to remain anonymous, spent more than a year studying the diamond and cutting and polishing it to its brilliance.
    "The color is whiter than white, it is free of any internal imperfections, and so transparent that I can only compare it to a pool of icy water," Gary Schuler, head of Sotheby's jewelry department in New York said in a release.
    Sotheby's sold its first 100-carat perfect diamond in 1990 in Geneva, Switzerland. The pear shape stone was considered by some to be a bargain at $12.7 million -- or $125,295 per carat.
    The price per carat for these stones has increased to $260,000, Sotheby's said in its release, but they expect this diamond will sell for as much as $25 million.
    If you'd like to see the stone before buying, the diamond will begin a worldwide tour on March 16 in Dubai, making stops in Los Angeles, Hong Kong, London, and Doha, before ending in New York.
    The auction is scheduled for April 21.