A non-fungible token (NFT) collection released by Brazilian artist Monica Rizzolli sold out within one hour, raking in an impressive sum of money.

What Happened: According to The Block report on Tuesday, Rizzolli's "Fragments of an Infinite Field" tokenized generative artwork collection sold out within one hour for 1,623 Ethereum (CRYPTO: ETH) — or about $5.55 million as of press time.

Her work depicts flowers within a “potentially infinite field of foliage” and was sold on NFT auction platform Art Blocks.

The NFTs were sold via a Dutch auction with a starting price of 10 ETH (over $34,000).

After the initial sale, the NFTs ended up being sold again on OpenSea for prices as high as 69 ETH (over $236,000) and the least expensive pieces of the set are priced at about 13.4 ETH ($46,000).

While some NFTs are being sold for exorbitant prices, many are being sold rather cheaply or even given away for free. For instance, Dfinity's Internet Computer (CRYPTO: ICP) announced the launch of 10,000 NFTs, 3,000 of which will be distributed for free.

Photo: Screenshot from YouTube, "Painting of one of the canvases from the series 'Queda' Sep 24 to Oct 1, 2010"