A recent discovery is giving the phrase “rock-hard cookie” a whole new meaning.

Today reports that a gemologist in Brazil recently unearthed a rare agate gemstone with a crystal pattern that bears a striking resemblance to the Cookie Monster from “Sesame Street.”

Lucas Fassari found the rock in the Rio Grande do Sul region of Brazil in November, according to the site.

California man Mike Bowers, the current proprietor of the stone according to Today, posted a video on Facebook on Jan. 15 showing off his prized possession. The 39-second clip is fittingly soundtracked to the classic “Sesame Street” tune, “C is for Cookie.”

Since posting the video, Bowers has received multiple bids to purchase the stone, CNET reports. “Prices can be very high,” he said in an interview. “I was proposed over $10,000 by five different buyers.”

The Cookie Monster rock went viral on Twitter on Jan. 23 after Jacqueline Antonovich, an assistant professor of history at Muhlenberg College, posted an image of the stone. As of Jan. 26, the post has received over 500,000 likes on Twitter.

Even the Cookie Monster himself commented on the stone. In a Jan. 25 tweet, the famous muppet stated, “Me no geologist, but me think dat rock look a lot like me ...”

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