A 100-carat emerald-cut diamond is on display at Sotheby's, Friday, April 17, 2015, in New York. The "perfect" 100-carat diamond in a classic emerald cut is going on the auction block, where it could fetch between $19 million to $25 million. Sotheby's will offer the white diamond on April 21, in New York. (AP Photo/Mary Altaffer)

A 100-carat emerald-cut diamond is on display at Sotheby’s, Friday, April 17, 2015, in New York. The “perfect” 100-carat diamond in a classic emerald cut is going on the auction block, where it could fetch between $19 million to $25 million. Sotheby’s will offer the white diamond on April 21, in New York. (AP Photo/Mary Altaffer)

Later this week Sotheby’s New York will sell a 100-carat, emerald cut internally flawless diamond, the largest of its clarity and cut ever shown at auction. .

The “perfect” diamond could fetch between $19 million to $25 million at auction, reports CNN.

“This 100.20-carat diamond is the definition of perfection. The colour is whiter than white. It is free of any internal imperfections,” Sotheby’s New York jewelry department head Gary Schuler said in a statement, likening its transparency “to a pool of icy water.”

The internally flawless D colour stone is the only classic emerald-cut white diamond of the highest colour and clarity and over 100 carats to come to auction, according to Sotheby’s, which will sell the diamond on Tuesday.

The auction description reads:

Leading this Magnificent Jewels sale is the ultimate 100-carat emerald-cut diamond, a D color, Internally Flawless diamond unlike any diamond offered at auction before. Also featured is an impressive Kashmir sapphire and diamond brooch formerly from the collection of Mrs. Paul Mellon that was designed by Jean Schlumberger for Tiffany & Co. Additional highlights include rare Art Deco jewels from Cartier, a suite of Harry Winston sapphire and diamond jewels, a selection of Art Moderne pieces and numerous top quality fancy colored diamonds and precious gemstones.

The diamond was mined in southern Africa within the last 10 years and weighed over 200 carats before it was cut and polished, the auction house said.

The owner wished to remain anonymous.

The uncut diamond weighed over 200 carats.

The uncut diamond weighed over 200 carats.

Only five “perfect” diamonds over 100 carats have sold at auction in the last 25 years, with a 118-carat oval-cut stone fetching $30.6 million at Sotheby’s in 2013. It set a record for a white diamond.

A record for any diamond is $46 million for a 24.78-carat emerald-cut pink stone, set at Sotheby’s in 2010. It also set a record for any jewel at auction.

Other highlights at the auction include a pear-shaped purplish pink diamond weighing 6.24 carats that has a pre-sale estimate of up to $3.5 million as well as a blue diamond and colored diamond ring weighing 6.06 carats that could bring in as much as $4.5 million.

Two Cartier Art Deco jewels, a rare platinum, emerald, sapphire, lapis lazuli and diamond pendant necklace as well as a ruby, emerald and diamond bracelet, will also be auctioned.

The Baron de Rothschild necklace is expected to sell for up to $2.2 million and the bracelet has a pre-sale estimate of up to $1.8 million, reports Reuters.

Two Kashmir sapphire and diamond rings could each bring in $1 million or more, according to Sotheby’s.